Log Message:
imapfilter: Update to 2.7.4 - via snow flurry in wip, thx!

    IMAPFilter 2.7.4 - 18 Nov 2020
      - Bug fix; incorrect argument to regular expression compile function.

    IMAPFilter 2.7.3 - 14 Nov 2020
      - Bug fix; incorrect free of compiled pattern.
      - Unexpected network errors and IMAP BYE are now logged.

    IMAPFilter 2.7.2 - 10 Nov 2020
      - Makefile is back to being Lua version agnostic.

    IMAPFilter 2.7.1 - 9 Nov 2020
      - Makefile now builds with Lua 5.4 and PCRE2.

    IMAPFilter 2.7 - 8 Nov 2020
      - Lua 5.4 compatibility (the codebase can still be compiled with versions
        5.3, 5.2 and 5.1).
      - PCRE2 compatibility (version 10.00 and later)
      - New error code is returned if certificate verify fails.
      - Bug fix; add missing truststore option from brief usage message.

    IMAPFilter 2.6.16 - 23 Nov 2019
      - Bug fix; escape the double-quote character in passwords.

    IMAPFilter 2.6.15 - 14 Nov 2019
      - Bug fix; try to setup both a CA file and path for SSL validations.

    IMAPFilter 2.6.14 - 1 Nov 2019
      - Bug fix; OpenSSL version mess up for SSL hostname validation.

    IMAPFilter 2.6.13 - 17 Sep 2019
      - Support for SSL hostname validation.

    IMAPFilter 2.6.12 - 3 Oct 2018
      - Support for Server Name Indication (SNI).
      - The searching methods return values are described in the config man page.
      - Example of using the enter_idle() function in the sample extend file.

    IMAPFilter 2.6.11 - 19 Nov 2017
      - Support for interrupting IDLE mode with SIGUSR1/SIGUSR2.
      - New "persist" option to try to recover a connection indefinitely.
      - New "range" option to limit messages included in a range.
      - Bug fix; always close selected mailbox before check_status().
      - Bug fix; closing of selected mailbox twice with fetch_message().