Stripping of query string (since 88b4755fa48f) stripped too much (issue327)

rstrip(qs) not only strips qs from the right, but it continues stripping
every char at the end of the URL that occurs on qs.

mercurial/httprepo.py

@@ -240,7 +240,8 b' class httprepository(remoterepository):'
             # this only happens with Python 2.3, later versions raise URLError
             raise util.Abort(_('http error, possibly caused by proxy setting'))
         # record the url we got redirected to
-        self._url = resp.geturl().rstrip(qs)
+        if resp.geturl().endswith(qs):
+            self._url = resp.geturl()[:-len(qs)]
         try:
             proto = resp.getheader('content-type')
         except AttributeError: