- 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/qcommon.h

@@ -227,6 +227,8 @@ typedef struct {
 	byte		unsentBuffer[MAX_MSGLEN];
 
 	int			challenge;
+	int		lastSentTime;
+	int		lastSentSize;
 
 #ifdef LEGACY_PROTOCOL
 	qboolean	compat;
@@ -250,7 +252,7 @@ PROTOCOL
 ==============================================================
 */
 
-#define	PROTOCOL_VERSION	69
+#define	PROTOCOL_VERSION	70
 #define PROTOCOL_LEGACY_VERSION	68
 // 1.31 - 67
 
@@ -296,9 +298,7 @@ enum svc_ops_e {
 	svc_snapshot,
 	svc_EOF,
 
-	// svc_extension follows a svc_EOF, followed by another svc_* ...
-	//  this keeps legacy clients compatible.
-	svc_extension,
+// new commands, supported only by ioquake3 protocol but not legacy
 	svc_voip,     // not wrapped in USE_VOIP, so this value is reserved.
 };
 
@@ -314,9 +314,7 @@ enum clc_ops_e {
 	clc_clientCommand,		// [string] message
 	clc_EOF,
 
-	// clc_extension follows a clc_EOF, followed by another clc_* ...
-	//  this keeps legacy servers compatible.
-	clc_extension,
+// new commands, supported only by ioquake3 protocol but not legacy
 	clc_voip,   // not wrapped in USE_VOIP, so this value is reserved.
 };
 
@@ -1042,7 +1040,7 @@ void SV_PacketEvent( netadr_t from, msg_t *msg );
 int SV_FrameMsec(void);
 qboolean SV_GameCommand( void );
 int SV_SendDownloadMessages(void);
-
+int SV_SendQueuedMessages(void);
 
 //
 // UI interface