Hosting dub packages on public Heptapod instances?

[Gregor Mückl]

Hi!

The dub registry is currently only allowing package hosting on 
github, gitlab or bitbucket. This is incredibly limited and does 
not allow packages hosted elsewhere. This choice also limits dub 
to git repositories although it handles e.g. Mercurial just fine 
in practice. At the minimum I'd like to see support for gitlab or 
Heptapod instances other than just gitlab.com. My personal 
motivation is that I had to move my publicly visible projects 
from Bitbucket to my own Heptapod instance recently because 
Atlassian has arbitrary decided to delete a ton of projects from 
Bitbucket.

Let's assume for a moment that a PR could be provided that adds 
this support. Would you want to have that feature in the dub 
registry in principle?