tor:
 * bump version to [https://gitweb.torproject.org/tor.git/blob/3121a6d0c8c8c3f7c01f09120dbe9c4f5a8adfdb:/ReleaseNotes 0.2.4.20]


git-svn-id: file:///var/svn/freetz/trunk@11449 149334a1-2f27-0410-a3b9-fc62619ac1e6