https://github.com/EQEmu/Server/blob...gelog.txt#L504 (that's the changelog entry for 1/13/2013, for when the line ref changes.)
HoT and VoA clients were removed because there is no available download source for them. (They were actually just content
patches to the UF client, if I remember correctly...)
If you would like to try and salvage the patch code for your server, you will have to dig around in the old svn repo. Reverting to a revision prior to that patch date would be a good start...
You will also need to adapt those files to the current eqemu server code..and from there, it get's hard...