Upgrade PHPMailer

[waldoj]

We're using an old version of PHPMailer for password-reset.php. The upgrade isn't drop-in — a new header stanza needs to be added, and the variables have changed slightly (e.g., the setFrom() method instead of the From variable). Use the Composer-loaded version of PHPMailer, and update password-reset.php to work with it.

[jalbertbowden]

can you elaborate on stanza? i haven't looked, sorry if that is annoying. i'm assuming its an include or something similar.
upgrading old phpmailer to composer version is currently a task i am working on @ work. would love to port that code here, knock this out.

[waldoj]

I don't remember specifically anymore, but I'm left with a general impression the current version of PHPMailer requires some kind of config options up front that it didn't used to — that's what I'm describing as the "header stanza."