[twgit] Init release 'release-2.2.0'.
Define SSH private key in conf/padocc-dist.php and use it in gitexport.sh.
Allow to use sqlite3 DB.
Don't add anymore $aConfig['default_remote_shell_user'] in Task::expandPath() if server is equal to '[]'.
Now Tasks/Base/Sync add $aConfig['default_remote_shell_user'] if needed.
Update CHANGELOG.md and fix some typo.
Follow coding standards.
Merge branch 'release-2.2.0' into stable