Allow TestingTorNetwork when alternate dir and bridge authorities are set.

Allow TestingTorNetwork when AlternateDirAuthority and
AlternateBridgeAuthority is set even if DirServer is not.

changes/bug6377

@@ -0,0 +1,4 @@
+ o Testing:
+   - Make it possible to set the TestingTorNetwork configuration
+     option using AlternateDirAuthority and AlternateBridgeAuthority
+     as an alternative to setting DirServer.

src/or/config.c

@@ -4091,9 +4091,13 @@ options_validate(or_options_t *old_options, or_options_t *options,
     });
   }
 
-  if (options->TestingTorNetwork && !options->DirServers) {
+  if (options->TestingTorNetwork &&
+      !(options->DirServers ||
+        (options->AlternateDirAuthority &&
+         options->AlternateBridgeAuthority))) {
     REJECT("TestingTorNetwork may only be configured in combination with "
-           "a non-default set of DirServers.");
+           "a non-default set of DirServer or both of AlternateDirAuthority "
+           "and AlternateBridgeAuthority configured.");
   }
 
   if (options->AllowSingleHopExits && !options->DirServers) {