[mms] Fix storing password object in the Horde_Smtp object.
Fix variable name
[mms] Change default security to use TLS, if available.

This mirrors the default settings of Net_SMTP, which this library was
designed to be a drop-in replacemen of.
Released Horde_Smtp-1.2.0
Development mode for Horde_Smtp-1.2.1
Optimization: if 530 code is seen, no need to send reset command
[mms] Transparently handle required TLS connection when no security was configured.