Add enable_starttls_auto and openssl_verify_mode options to mail notifications' config for SMTP transport
Restore support for unauthenticated mail sent
Documentation update
Add :enable_starttls_auto and :openssl_verify_mode as instance attributes
Add validity check on new options
Merge branch 'ssl_support_for_smtp_notifications' of github.com:gi-lunaweb/god

Conflicts:
	doc/god.asciidoc