Change the mailer to just use plain SSL.

This is simpler than the previous connect-then-starttls approach I
lifted from the userman mailer, and appears to work better with
gmail, which is the most thing we'll be sending email through.

Change-Id: Ife25ca3263e5d52c9957714ed185d041a42b489d
Insert a newline for clarity.

Change-Id: Iba84edc61a49c96d24d20564022699ed435c845e