Revert protocol 69 pending further discussion (#4962)

code/server/server.h

@@ -188,11 +188,7 @@ typedef struct client_s {
 #endif
 
 	int				oldServerTime;
-	qboolean		csUpdated[MAX_CONFIGSTRINGS+1];	
-	
-#ifdef PROTOCOL_SUPPORT_OLD
-	qboolean		compat;
-#endif
+	qboolean			csUpdated[MAX_CONFIGSTRINGS+1];	
 } client_t;
 
 //=============================================================================
@@ -201,11 +197,7 @@ typedef struct client_s {
 // MAX_CHALLENGES is made large to prevent a denial
 // of service attack that could cycle all of them
 // out before legitimate users connected
-#define	MAX_CHALLENGES	2048
-// Allow a certain amount of challenges to have the same IP address
-// to make it a bit harder to DOS one single IP address from connecting
-// while not allowing a single ip to grab all challenge resources
-#define MAX_CHALLENGES_MULTI (MAX_CHALLENGES / 2)
+#define	MAX_CHALLENGES	1024
 
 #define	AUTHORIZE_TIMEOUT	5000