community/dar: upgrade to 2.7.3
Release notes: https://sourceforge.net/p/dar/mailman/message/37410380/
from 2.7.2 to 2.7.3
- fixed bug met when restoring files in sequential-read mode and feeding the backup to dar on its stdin: When dar had to remove a file that had been deleted at the time of the backup since the backup of reference was made, dar aborted the restoration reporting it could not skip backward on a pipe.
- adding call to kill() then join() in destructor of class slave_thread and fichier_libcurl to avoid the risk of SEGFAULT in rare conditions under Cygwin (Windows)
- fixed several typos in bug, messages and comments
- fixed script used to build windows binary to match recent cygwin dll
- fix spelling and improved clarity in dar_split messages