vpopmail, open_smtp_relay and non-PLAIN auth mechs

I've noticed that if using the vpopmail auth setup, that the roaming-user functionality provided via open_smtp_relay() is only done if the auth mechanism is PLAIN. For example, if the client authenticates via DIGEST-MD5, the open relay file is not updated, as it should be.

This is due to the call to open_smtp_relay only being done via vpopmail_verify_plain(). Instead, imo, that call should be done in auth_request_success() in the auth-request.c file, so that it is done however the authentication is done, as long as it is successful.

Attached is a patch for 2.2.15. Let me know if attachments are not the preferred method and I'll cut/paste.

tia!

-- Jim Jagielski