Zentyal/sogo — pull request #64 by sixstone-qq (2014-12-01 23:03:11+00:00)
Title: Store changeNumber maps with modseq in cache for subfolders

By getting the root folder/container whose properties
are stored in OpenChange DB.

This makes the synchronisation of sub-folders faster as
when we evaluate restrictions for this folder, we are able
to get the modseq from where to get the latest messages
unseen by the client.