docs fixes and cleanup

- cleanup scoreboard menu code
- clientlog info messages for debug binaries only
- have debug binaries check for easy docs errors
- docinvalid now also checks for broken references

source/src/zip.cpp

@@ -553,7 +553,7 @@ void addzipmod(char *name)
     mountzip(*arch, NULL, NULL, !strncmp(behindpath(name), "###", 3));
     archives.add(arch);
     rebuildzipfilehashtable();
-    clientlogf("added zipmod %s, %d bytes, %d files", pname, zipsize, arch->files.length());
+    DEBUGCODE(clientlogf("added zipmod %s, %d bytes, %d files", pname, zipsize, arch->files.length()));
 }
 COMMAND(addzipmod, "s");