sv.datagram is now flushed to client->unreliablemsg buffers, along with

sv.datagram is now flushed to client->unreliablemsg buffers, along with
logging of good split points so that each effect can be issued to
different packets as space allows (sending some each packet), this makes
effects finally obey the rate limit
cleaned up sending of csqc stats in pre-DP6 protocols and renamed the
autosentstats stuff to customstats to better represent what it does
implemented stats updates in pre-DP6 protocols (mostly for sake of
customstats code cleanlyness)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@7105 d7cf8633-e32d-0410-b094-e92efae38249