Log Message:
mc: Update to 4.8.23

Version 4.8.23

- Core

  * Modify "File exists" query dialog (#3935):
    * change layout
    * rename "Update" button to "If older"
    * add new "If smaller" button": overwrite file with smaller one
    * add "Don't overwrite with zero length file" checkbox
  * Speed up of large directory structures delete (#3958)
  * Support key binding for menu (#212)

- Editor

  * Expanded syntax highlighting rules (#3975):
    * expanded file name regexp for sh.syntax
    * use ini.syntax for systemd cofiguration files
  * Syntax updates:
    * shell (#3981)
    * ebuild (#3988)
    * RPM spec (#3991)

- Viewer

  * Quick one-off backwards search with N. New action SearchOppositeContinue for \ 
key bind (default is shift-n) (#3452)

- Misc

  * Code cleanup (#3955)
  * Use Geeqie (a fork of GQview) as main image viewer, fallback to GQview (#3962)
  * File highlighting updates (#3966)
    * .go, .s: highlight as source
    * .m4v: highlighting as media
  * New skins:
    * featured-plus: featured skin with alternative directory and file \ 
select/mark colors (#3973)

- Fixes

  * Compilation fail on AIX (#3960)
  * Incorrect file version sort (#3965, #3905)
  * Garbage in the hardlink error creation message window (#3990)
  * Cannot shell, or FTP, or SFTP link when the file panel is tree, or info, or \ 
quick view (#3948)
  * Failed gpm connect attempt ... for vc /dev/tty0 (#3208, #3614)
  * Incorrect include/editor order in mc.ext (#3965)
  * mcedit: incorrect C/C++ syntax highlighting in some cases (#3487)
  * Unknown type name 'sighandler_t' on Illumos (#3971)