fixed a lot of problems with filling out client edicts properly (or rather, not filli...

fixed a lot of problems with filling out client edicts properly (or rather, not filling them out properly) which mostly appeared when doing changelevel or restart
fixed nameless player joins/exits (finally!)
code cleanups
other little things stomped
took another stab at fixing bogus entities being linked into areagrid (presumably caused by SV_IncreaseEdicts), hopefully fixing it this time (as if that wasn't the hope with all the previous attempts)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@3188 d7cf8633-e32d-0410-b094-e92efae38249