Revert "Merge pull request #1089 from AltGr/allow-url-mirrors"

This reverts commit fe48dea42b2f6579d7acd6a056aed4a0c8b658e2, reversing
changes made to 42dbc3086fcd7390db63ba6846ea9fa171dad266.

Also removes the corresponding line from CHANGES
Merge pull request #1093 from AltGr/revert-mirrors

Url mirrors will be for after 1.1.1