use Firefox, not Netscape

git-svn-id: svn://svn.icculus.org/netradiant/trunk@178 61c419a2-8eb2-4b30-bcec-8cead039b335

radiant/url.cpp

@@ -40,7 +40,7 @@ bool open_url(const char* url)
   // \todo FIXME: the way we open URLs on *nix should be improved. A script is good (see how I do on RTCW)
   char command[2*PATH_MAX];
   snprintf (command, sizeof(command), 
-            "netscape -remote \"openURL(%s,new-window)\" || netscape \"%s\" &", url, url);
+            "firefox -remote \"openURL(%s,new-window)\" || firefox \"%s\" &", url, url);
   return system(command) == 0;
 }
 #endif