remove support for credentials in url

src/zc/buildout/download.py

@@ -327,8 +327,6 @@ class Download(object):
                 header_dict["PRIVATE-TOKEN"] = auth[1]
             else:
                 query[auth[0]] = auth[2] # only private_token is supported ?
-        elif p.username == "PRIVATE-TOKEN" and p.password:
-            header_dict["PRIVATE-TOKEN"] = p.password
 
         qrepo     = quote(repo, '')
         qfilepath = quote(filepath, '')
@@ -350,14 +348,10 @@ class Download(object):
         for k, v in headers.items():
             req.add_header(k, v)
         with closing(urlopen(req)) as src:
-            try:
-                # If Access denied to gitlab url, we have response 200 here
-                # and url is to BASE_URL/users/sign_in
-                if src.url.rindex("users/sign_in"):
+            # If access to gitlab url was denied,
+            # we have been redirected to BASE_URL/users/sign_in
+            if src.url.endswith("users/sign_in"):
                 raise GitlabAccessDeniedError("Redirected to Sign in page")
-            except ValueError:
-                # nothing to do
-                pass
             with open(tmp_path, 'wb') as dst:
                 shutil.copyfileobj(src, dst)
             return tmp_path, src.info()