Reproduce:
* Centos6
* Specific mail header
* Notification on path
* Try to commit, failure
https://c6.valid.enalean.com/svn/admin/?func=notification&group_id=108
$> svn ci -m "Improve awesomness"
Sending trunk/VERSION
Transmitting file data .
Committed revision 4.
Warning: post-commit hook failed (exit code 22) with no output.