Branch to port changes to off of trunk for the next 0.6 point release(s).

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3802 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Fix a cvar unlatching bug introduced in r3788 that occurs during the demo loop, where after the first demo of the loop has been played, cvars would not be unlatched for the next demo (bug 973).

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3803 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Forgot to add the CVAR_NOENABLEDISABLE flag to sv_spawndelaytime.

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3804 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Remove a second, useless call to CTF_CheckFlags from P_KillMobj.

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3805 b0bcef46-2027-0410-bd56-ab726e9a1d04
-When unregistering players from the Unlag class, the cached player_t pointer was not being updated properly because players.erase had not yet been called, making player_history::player point to an incorrect player in some cases (bug 974).

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3806 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Prevent the server from sending svc_movemobj and svc_mobjspeedangle messages for player mobjs as the information is already contained in the svc_moveplayer messages.
-Clients no longer apply snapshots to dying or dead players as this creates jerky animation with cl_interp.

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@3807 b0bcef46-2027-0410-bd56-ab726e9a1d04
Haven't really used this yet, may or may not need to...

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@4099 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Merge from trunk into 0.6.x.

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@4212 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Change the button bit-encoding for BT_JUMP, which set two bits, one of which overlapped with weapon-change encodings.
-This caused the game to change to the wrong weapon when the player changed to slot 3 while jumping (bug 1017).

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@4213 b0bcef46-2027-0410-bd56-ab726e9a1d04
Merge from trunk

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@4541 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Merge from trunk into 0.6.x.

git-svn-id: http://odamex.net/svn/root/branches/0.6.x@4626 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Merge from 0.6.x into trunk.

git-svn-id: http://odamex.net/svn/root/trunk@4627 b0bcef46-2027-0410-bd56-ab726e9a1d04