use the name from [dir] rather than campaign_name=...

...which might be different from lowercasing

data/tools/wesnoth/campaignserver_client.py

@@ -458,5 +458,6 @@ class CampaignClient:
             if verbose:
                 sys.stderr.write(i * " " + name + "\n")
             self.unpackdir(dir, os.path.join(path, name), i + 2, verbose)
+        return name
 
 # vim: tabstop=4: shiftwidth=4: expandtab: softtabstop=4: autoindent:

data/tools/wesnoth_addon_manager

@@ -120,7 +120,7 @@ if __name__ == "__main__":
         else:
             decoded = cs.decode(mythread.data)
             print "Unpacking %s..." % name
-            cs.unpackdir(decoded, cdir, verbose = options.verbose)
+            name = cs.unpackdir(decoded, cdir, verbose = options.verbose)
             dirname = os.path.join(cdir, name)
             info = os.path.join(dirname, "_info.cfg")
             try: