Allow pac+file proxy scheme to load PAC file from local filesystem

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>

qutebrowser/utils/urlutils.py

@@ -613,7 +613,7 @@ def proxy_from_url(url):
         raise InvalidUrlError(url)
 
     scheme = url.scheme()
-    if scheme in ['pac+http', 'pac+https']:
+    if scheme in ['pac+http', 'pac+https', 'pac+file']:
         return pac.PACFetcher(url)
 
     types = {

tests/unit/config/test_configtypes.py

@@ -1483,6 +1483,7 @@ class TestProxy:
         'none',
         'http://user:pass@example.com:2323/',
         'pac+http://example.com/proxy.pac',
+        'pac+file:///tmp/proxy.pac'
     ])
     def test_validate_valid(self, klass, val):
         klass(none_ok=True).validate(val)