Add support for referencing series using cover letter message-id
Currently it's possible to reference patches using the message-id, for example http://patchwork.freedesktop.org/patch/msgid/600101c8433e7caf9303663fc85a9972fa1f05e7.1575560168.git.jani.nikula@intel.com will redirect to https://patchwork.freedesktop.org/patch/343812/
I would like to be able to reference patch series using the cover letter message-id, and, additionally, using the message-id of any patch in the series.
For example, the following should redirect to https://patchwork.freedesktop.org/series/70502/
- https://patchwork.freedesktop.org/series/msgid/cover.1575560168.git.jani.nikula@intel.com
- http://patchwork.freedesktop.org/series/msgid/600101c8433e7caf9303663fc85a9972fa1f05e7.1575560168.git.jani.nikula@intel.com
- http://patchwork.freedesktop.org/series/msgid/c945ac7b08e0eb0827cf647609885f4abdb84f1d.1575560168.git.jani.nikula@intel.com