In case username (and maybe password) is present in url, they are removed

from it before prefix matching.

This resolves unclear situation with respect to .prefix-es. Currently
(as far as mercurial_keyring is considered), prefixes (in .hgrc)
should always be defined without username (albeit I am considering
handling both)

mercurial_keyring.py

@@ -320,7 +320,7 b' class HTTPPasswordHandler(object):'
         base_url, url_user, url_passwd = self.unpack_url(authuri)
         ui.debug(_('keyring: base url: %s, url user: %s, url pwd: %s\n') %
                  (base_url, url_user or '', url_passwd and '******' or ''))
-        
+
         # Extract username (or password) stored directly in url
         if url_user and url_passwd:
             return url_user, url_passwd, self.SRC_URL, base_url
@@ -492,14 +492,15 b' class HTTPPasswordHandler(object):'
     @staticmethod
     def unpack_url(authuri):
         """
-        Does two things:
+        Takes original url for which authentication is attempted and:
 
-        1. Strips query params from url. Used to convert urls like
-        https://repo.machine.com/repos/apps/module?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between
-        to
-        https://repo.machine.com/repos/apps/module
+        - Strips query params from url. Used to convert urls like
+          https://repo.machine.com/repos/apps/module?pairs=0000000000000000000000000000000000000000-0000000000000000000000000000000000000000&cmd=between
+          to
+          https://repo.machine.com/repos/apps/module
 
-        2. Extracts username and password, if present.
+        - Extracts username and password, if present, and removes them from url
+          (so prefix matching works properly)
 
         Returns url, user, password
         """
@@ -510,8 +511,12 b' class HTTPPasswordHandler(object):'
         # Strip arguments to get actual remote repository url.
         # base_url = "%s://%s%s" % (parsed_url.scheme, parsed_url.netloc,
         #                       parsed_url.path)
+        user = parsed_url.user
+        passwd = parsed_url.passwd
+        parsed_url.user = None
+        parsed_url.passwd = None
 
-        return str(parsed_url), parsed_url.user, parsed_url.passwd
+        return str(parsed_url), user, passwd
 
 
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