Allow mech.__str__ to be dotted form
Allow mech.__str__ to be dotted form

Validate that sasl_name is nonempty before assigning it to base;
this prevents the situation where the sasl_name query succeeds,
but the contents of the name are empty.

Signed-off-by: Alexander Scheel <99b0f3d0e6ad1985dc5dbf37c21ba6d1a0a6ef03@gmail.com>

pythongssapi/python-gssapi,pythongssapi/python-gssapi,pythongssapi/python-gssapi