[development] Privatemsg needs a better maintainer

[Karoly Negyesi]

Hi,

To cut a long story short, I am not a good maintainer. This module
needs much more love than I can give it. For example, the 2.x branch
should use subscriptions for its mailing needs but it has not kept up
with the ground-up rewrite of subscriptions. Please help.

Thanks,

Karoly Negyesi