fixed the listen server unpause lag / time-out

this issue popped up after commit 176aa6a24d

code/client/cl_cgame.cpp

@@ -814,7 +814,7 @@ void CL_SetCGameTime()
 	}
 
 	// allow pause in single player
-	if ( sv_paused->integer && cl_paused->integer && com_sv_running->integer ) {
+	if ( sv_paused->integer && CL_Paused() && com_sv_running->integer ) {
 		return;
 	}
 

code/client/cl_main.cpp

@@ -1472,7 +1472,7 @@ static void CL_CheckTimeout()
 		return;
 	}
 
-	if ( ( !cl_paused->integer || !sv_paused->integer )
+	if ( ( !CL_Paused() || !sv_paused->integer )
 		&& cls.state >= CA_CONNECTED && cls.state != CA_CINEMATIC
 		&& cls.realtime - clc.lastPacketTime > cl_timeout->value*1000) {
 		if (++cl.timeoutcount > 5) {	// timeoutcount saves debugger
@@ -1493,7 +1493,7 @@ static void CL_CheckUserinfo()
 		return;
 	}
 	// don't overflow the reliable command buffer when paused
-	if ( cl_paused->integer ) {
+	if ( CL_Paused() ) {
 		return;
 	}
 	// send a reliable userinfo update if needed
@@ -1587,6 +1587,22 @@ int CL_ScaledMilliseconds()
 }
 
 
+qbool CL_Paused()
+{
+	// Summary: We keep the client pause active until we get a new server time through a snapshot.
+	//
+	// Without this fix, after the client pause ends and before we get a new server snapshot,
+	// CL_AdjustTimeDelta will update cl.serverTime to a higher value
+	// and that value is sent in the ucmd_t data to the server (CL_FinishMove).
+	// Since the timestamp is "from the future", anything that follows needs to be
+	// at least as high, which won't happen for a while because cl.serverTime will get reset to
+	// something correct (i.e. lower) upon reception of the next snapshot from the server.
+	// In other words: After a client pause of X seconds, the server ignores the client's input
+	// for X seconds and the client is basically timing out. Oops.
+	return cl_paused->integer || cl_paused->modified;
+}
+
+
 static void CL_InitRenderer()
 {
 	// this sets up the renderer and calls R_Init

code/client/cl_parse.cpp

@@ -209,6 +209,11 @@ static void CL_ParseSnapshot( msg_t *msg )
 
 	newSnap.serverTime = MSG_ReadLong( msg );
 
+	// now that we have a server time update,
+	// we can consider the client pause (if active) truly over
+	// see CL_Paused for the details
+	cl_paused->modified = qfalse;
+
 	newSnap.messageNum = clc.serverMessageSequence;
 
 	deltaNum = MSG_ReadByte( msg );

code/client/client.h

@@ -376,6 +376,8 @@ int CL_ServerStatus( char *serverAddress, char *serverStatusString, int maxLen )
 void CL_DownloadsComplete();
 void CL_DemoCompleted();
 
+qbool CL_Paused();
+
 
 // cl_browser