[aur-general] Make AUR notifier messages more visible

[Anatol Pomozov]

Hi

I found that AUR comment emails are too invisible in my mailbox. The
reason is that notifier sends messages to aur-notify at archlinux.org and
hides my email in "bcc". Thus email clients (e.g. gmail) do not mark
those emails with ">" symbol and they lost in miriads of similar
emails from maillists.

It would be better if these emails were sent "to" user email as it
makes such emails more visible.