[PATCH v2] REST: allow fetching of subject prefixes

[Russell Currey]

On Tue, 2017-02-21 at 16:45 +1100, Daniel Axtens wrote:
> Some mailing lists accept patches for multiple projects, and use
> a subject prefix to differentiate the projects.
> 
> Therefore, for snowpatch, it's useful to be able to fetch the
> subject prefixes.
> 
> Export subject prefixes in the REST API.
> 
> Signed-off-by: Daniel Axtens <dja at axtens.net>
> 

Tested-by: Russell Currey <ruscur at russell.cc>