- Improve snapshot rate and data rate control

- Make server send packet fragments and queued packets when server is idle
- Voip protocol detection is tied to com_protocol making past-end-of-message reading unncessary
- Use Hunk_AllocateTempMemory() for buffering VOIP packets and fix buffering scheme that ryan hates so much
- Disable packet scrambling for new protocol as it is useless now
- Get rid of the old packet scrambling functions predating latest point release
- Use Hunk_AllocateTempMemory() for netchan packet queue to fix memory leak when client gets disconnected with packets in the queue
- Use Hunk_AllocateTempMemory() for download blocks to fix memory leak when client gets disconnected with download blocks in the queue
- Fix SV_RateMsec to account for udp/udp6 packet lengths

code/qcommon/common.c

@@ -3111,7 +3111,11 @@ void Com_Frame( void ) {
 		{
 			if(com_sv_running->integer)
 			{
-				// Send out download messages now that we're idle
+				// Send out fragmented packets now that we're idle
+				delayT = SV_SendQueuedMessages();
+				if(delayT >= 0 && delayT < timeVal)
+					timeVal = delayT;
+					
 				if(sv_dlRate->integer)
 				{
 					// Rate limiting. This is very imprecise for high
@@ -3145,21 +3149,32 @@ void Com_Frame( void ) {
 								// all of the bandwidth. This will result in an
 								// effective maximum rate of 1MB/s per user, but the
 								// low download window size limits this anyways.
-								timeVal = 2;
+								if(timeVal > 2)
+									timeVal = 2;
+									
 								dlNextRound = dlStart + deltaT + 1;
 							}
 							else
 							{
 								dlNextRound = dlStart + delayT;
-								timeVal = delayT - deltaT;
+								delayT -= deltaT;
+								
+								if(delayT < timeVal)
+									timeVal = delayT;
 							}
 						}
 					}
 				}
 				else
+				{
 					SV_SendDownloadMessages();
+					timeVal = 1;
+				}
 			}
 
+			if(timeVal == 0)
+				timeVal = 1;
+
 			if(com_busyWait->integer)
 				NET_Sleep(0);
 			else