Include #ifdef to make it easier to create a stand-alone binary.

code/server/server.h

@@ -290,7 +290,9 @@ void SV_GetChallenge( netadr_t from );
 
 void SV_DirectConnect( netadr_t from );
 
+#ifndef STANDALONE
 void SV_AuthorizeIpPacket( netadr_t from );
+#endif
 
 void SV_ExecuteClientMessage( client_t *cl, msg_t *msg );
 void SV_UserinfoChanged( client_t *cl );