Added patch for #692775 (TYPO3-SA-2012-5)
Set patch level version to pl.4.5.21.
New version 4.5.19-3.
Added patch for regression introduced in the last patch.
Set patch level to 4.5.22.
Fix "copyright file missing after upgrade (policy 12.5)".
Added patch for security-sa-2013-001. (Fixes: 702574)
Release of 4.5.19+dfsg1-5.