Version 0.18 (UNRELEASED)
    * Switch from PCRE to PCRE2
    * Enable dynamic linking by default
    * Support multithreading for hashsum calculation
      - add --without-pthread configure option
      - add new log level 'thread'
      * add num_workers config option
      - add new '--workers' parameter
      - add new exit code 23 for thread errors
      - require Autoconf Macro Archive (autoconf-archive)
    * Deprecations (to be removed in the release after next):
        - '@@ifdef', macro is now deprecated, use '@@if defined' instead
        - '@@ifndef', macro is now deprecated, use '@@if not defined' instead
        - '@@ifhost', macro is now deprecated, use '@@if hostame' instead
        - '@@ifnhost', macro is now deprecated, use '@@if not hostname' instead
    * Add 'report_format' option (available formats: `plain`, `json`)
    * Add @@if macro
    * Add 'exists' boolean function
    * Add 'config_check_warn_unrestricted_rules' option
    * Support restricted rules with empty restriction
    * Add prefix option to directory include macros
    * Add exit code 22 for memory allocation errors
    * Support CRLF line-endings in config files
    * Improve logging
    * Improve error message during config parsing
    * Update documentation
    * Minor bug fixes
    * Code clean up

Version 0.17.4 (2022-01-19)
    * SECURITY FIX
        - Precalculate buffer size in base64 functions (CVE-2021-45417)

Version 0.17.3 (2021-02-10)
    * Fix group usage in '--after' config line

Version 0.17.2 (2021-02-06)
    * Fix null pointer dereference in db_close()
    * Fix out-of-bounds read of attributes array

Version 0.17.1 (2021-01-30)
    * Require file type for --path-check
    * Fix issue where 'different attributes' message is not shown
    * Remove leftover include of 'error.h' (fixes build on macOS)
    * Fix typos

Version 0.17 (2021-01-23)
    * BACKWARDS INCOMPATIBLE CHANGES
        - '--verbose' command line option and 'verbose' config option are no
          longer supported, use 'log_level' and 'report_level' options instead
        - '--report' command line option is no longer supported, use
          'report_url' config option instead
        - 'ignore_list' config option is no longer supported, use
          'report_ignore_changed_attrs' instead
        - 'report_attributes' config option is no longer supported, use
          'report_force_attrs' instead
        - (restricted) regular rules must start with literal '/', i.e. the rule
          cannot begin with a macro variable
        - config lines must end with new line
        - '@' and ' ' in the configuration are now escaped with '\', that means
          to match a '\' you have to use four backslashes '\\\\' in your rules
        - 'gzip_dbout=false' fails now with config error when no zlib support
          is compiled in
        - remove '--with-initial-errors' configure option
        - remove PostgreSQL database backend support
        - remove Sun ACL support
        - remove config and database signing support
    * Enhancements:
        - add new '--log-level' command line option and 'log_level' config option
        - introduce named log levels
        - add new 'report' log level to help to debug rule matching
        - add new 'config' log level to help to debug config and rule parsing
        - aad new '--dry-init' command
        - add new '--path-check' command
        - add directory support for @@include
        - add new @@x_include config macro
        - add new @@x_include_setenv config macro
        - add new default compound group 'H' (all compiled-in hashsums)
        - add support for per-report_url options
        - add new 'report_level' config option
        - add new 'report_append' config option
        - add exit code 21 for file lock errors
        - add default config values, available hashsums and compound groups
          to '--version' output
        - add Linux capabilities support
        - show changed attributes in 'different attributes' message
        - enable 'gost' and 'whirlpool' checksums when using gcrypt
        - add 'stribog256' and 'stribog512' gcrypt algorithms
        - add config file names to log output
    * Miscellaneous behaviour changes:
        - 'report_summarize_changes': hashsum changes are now indicated with 'H'
        - print '--help' and '--verion' output to stdout
        - log messages and errors are always written to stderr
        - initialise report URLs after configuration parsing
        - allow empty values for macro variables
        - SIGUSR1 now toggles debug log level
        - fail on errors in regular expressions during config parsing
        - fail on invalid URLs during config check
        - Fail on double slash in rule path
        - cache log lines when 'log_level' is not yet set
    * Deprecations:
        - 'database' config option is now deprecated, use 'database_in' instead
        - 'summarize_changes' config option is now deprecated, use
          'report_summarize_changes' instead
        - 'grouped' config option is now deprecated, use 'report_grouped'
          instead
        - non-alphanumeric group names are deprecated
    * Notable bug fixes:
       - fix line numbers in log messages
       - remove warning when input database is '/dev/null'
       - correctly handle UTF-8 in path names and rules
       - fix compilation with curl and gcrypt
       - warn on unsupported hash algorithms
       - improve large-file support
    * Build system changes:
        - require C99 compatible compiler
        - require pkg-config
        - '--disable-default-db configure option disables default database values
        - '--without-config' configure option now disables default config file
    * Remove obsolete aide-attributes.sh script
    * Remove outdated example aide.conf and manual.html
    * Fix compiler warnings
    * Update documentation
    * Minor bug fixes
    * Code clean up

Version 0.16.2 (2019-05-19)
    * Bug fixes
        - Fix handling of directory-restricted negative rules
        - Don't lock '/dev/null' when used as output database
        - Fix parsing of rules containing '?' quantifier
        - Fix extended attributes support (xattrs)
        - Fix processing of go files
    * Please note:
        - The addition of the "trusted.*", "user.*" and the "security.*"
          namespaces to the xattrs attribute might lead to a vast amount of
          reported changed entries during your next AIDE run. You can use the
          `report_ignore_changed_attrs` option (see aide.conf(5)) to ignore
          changes of the xattrs attribute; but be aware that this will exclude
          the expected but also the unexpected (potentially malicious) changes.

Version 0.16.1 (2019-02-25)
    * Move to GitHub
    * Update documentation
    * Bug fixes

Version 0.16 (2016-07-25)
    * BACKWARDS INCOMPATIBLE CHANGES:
        - Negative selection lines of the form '!<regex> <groups>' are no
          longer supported (use '!<regex>' instead)
        - The switch to Perl 5 Compatible Regular Expressions and the fix of
          '.*'-rule matching may result in different rule matching behaviour
    * Support restricted selection lines
    * Switch to PCRE library (drops bundled GNU regexp library)
    * New config options:
        - database_add_metadata
        - database_attrs
        - report_base16
        - report_detailed_init
        - report_force_attrs (deprecates report_attributes)
        - report_ignore_added_attrs
        - report_ignore_removed_attrs
        - report_ignore_changed_attrs (deprecates ignore_list)
        - report_ignore_e2fsattrs
        - report_quiet
        - root_prefix
    * New '--limit' parameter
    * Report changes:
        - enable summarize_changes by default
        - use '|' to separate the old value from the new one
        - wrap attribute values instead of cut them off
        - side-by-side output of acl and xattrs values
        - adjust file type letters in summarize_changes output
        - add numeric timezone to time string
        - add info about verbose level to report if it differs from standard
          value
        - add info about number of entries if aide found no changes or
          the database has been initialized
        - add run time to report
        - print "End timestamp" message in report
        - print human-readable info about ignored and forced attributes in report
        - print checksums of databases in verbose level 2 or higher
        - print added and removed attribute values of changed entries in
          verbose level 6 or higher
        - print details about added and removed entries in verbose level 7
          or higher
        - print added or removed attributes of changed entries if forced via
          report_force_attrs
    * New default group: X
    * Fix '.*'-rule matching
    * Handle tilde (~) in database paths and report urls
    * Sort entries of database file
    * Compare database entries just once
    * Add warning if a group is redefined
    * Update documentation
    * Bug fixes
    * Code clean up

Version 0.15.1
    * Fixed bug with DB_CHECKINODE

Version 0.15
    * Added new grouped option
    * Sort files in report by filename
    * Added support for e2fsattrs attribute
    * Added support for ftype attribute
    * Bug fixes

Version 0.14.2
    * Report correct file type in "Detailed information
      about changes" section
    * Bug fixes

Version 0.14.1
    * Added aide-attributes.sh contrib script
    * Bug fixes

Version 0.14
    * Renewed autoconf mechanism
    * Resolved licensing conflicts
    * New feature to summarize changes
    * Added prelink support
    * Many bugfixes

Version 0.13.1
    * Fixed bug with reading gzipped aide.db files
    * Removed dead ustat code

Version 0.13
    * Added support for selinux and xattr attributes
      (kindly contributed by Red Hat)
    * Added support for the Linux Audit System
      (kindly contributed by Red Hat)
    * Fixed usage of libgcrypt instead of libmhash
    * Added file locking for output files
    * Fixed bugs

Version 0.12
    * Fixed bugs
    * Allow http/https/ftp URLs through libcurl
    * Support posix_fadvice() to avoid caching files

Version 0.11
    * Fixed many bugs
    * Updated automake/autoconf scripts
    * Use snprintf by Mark Martinec if not in C library
    * Support for more (legacy) Unix systems and cygwin
    * Open files with O_NOATIME on supported Linux systems
    * Added I/ANF/ARF directives

Version 0.10
    * Fixed bugs
    * Moved project over to sourceforge.net
    * Change of project ownership

Version 0.9
    * Fixed bugs
    * Added support for keyed md check of db and config
    * Removed dependancy on libgcrypt
    * Added dependancy on mhash

Version 0.8
    * Fixed loads and loads of bugs
        * Added syslog backend
        * Report format changed
        * added lots of parameters see man page and configure --help
        * added ACL support for SunOS 5.x (and compatibles)
    * libgcrypt is now separate and required

Version 0.7
    * Bug fixes
    * Compressed database support
    * Linkname checking
    * Mhash support (version 0.8.1 of mhash required)

Version 0.6
    * Bug fixes
    * Mhash support fixed
    * MD sums fixed for now

Version 0.5
    * Bug fixes
    * ignore_list support
    * Mhash library support (version 0.6.1 of mhash required)
    * Disclaimer notices

Version 0.4
    * Bug fixes

Version 0.3
    * Added --update command
    * some bugfixes
Version 0.2
    * Bugfix release
Version 0.1
    * Implemented lots of stuff
Version 0.0.0.1
    * Nothing yet
