[horde] List of modules etc. compatible with Horde 5.1.6

[Jānis]

Hi!

Where can I find the list of latest compatible modules and libraries  
for Horde 5.1.6 as for downgrade the only option is to know exact  
version numbers.

How can I sweep up all the trash left over from 5.2.2 after downgrade?

Janis