New message: cl_say

This message allows you to pass along a player id for identifying who sent the message in an unambiguous way.  SV_Say() is changed to use this new message.

git-svn-id: http://odamex.net/svn/root/trunk@3728 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Add a server cvar sv_maxunlagtime (default 1.0 seconds) that allows admins to set a maximum time for 'unlagged' player reconciliation. If a player's round-trip latency exceeds this value, the player has to lead his target by the difference between his latency and the sv_maxunlagtime.

git-svn-id: http://odamex.net/svn/root/trunk@3729 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Remove AActor::roll (unused)

git-svn-id: http://odamex.net/svn/root/trunk@3730 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Spawn a bullet puff instead of blood splats when shooting a teammate with sv_friendlyfire disabled.

git-svn-id: http://odamex.net/svn/root/trunk@3731 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Fix a crash in r3731.

git-svn-id: http://odamex.net/svn/root/trunk@3732 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Fix a vanilla physics bug with +moveup.

git-svn-id: http://odamex.net/svn/root/trunk@3733 b0bcef46-2027-0410-bd56-ab726e9a1d04