Send mail via any SMTP or sendmail server

[michaelstorm]

This allows the :via_options parameter to Pony.mail() to be set in environment.rb, which in turn allows Barkeep's mail to be delivered via our internal Exchange server. The default Gmail settings still work fine. It also lets you authenticate with a different username than you send mail with.

I also added the SINGLE_OUTGOING_MAIL_ADDRESS variable, which disables the "+commits", "+comments" and "+requests" suffixes when set to true. Our mail server, by default, doesn't let users send mail with a different outgoing address than their own. So it's one less permissions headache for me, when you're just trying Barkeep out :-).

Mike

[philc]

Nice Michael, thanks for extending our mail setup. The next step is to give some thought on how to integrate something like this alongside the other configuration options that Barkeep takes. You'll notice that currently environment.rb is a simple list of key value pairs where values are all strings so that they can be filled in by Fezzik, our deployment framework, and your PR introduces a value that is a hash.

If we decouple all of the deployment code of Barkeep as suggested here then we'll probably revisit how we do configuration.

[michaelstorm]

Fixed in d95c27a; my mistake. Ruby isn't a primary language of mine, so I'm sorry if the fix is unidiomatic. I'm also worried about the MAIL_USER and MAIL_DOMAIN variables engendering confusion, since they're not used outside of environment.rb.