[SSSD] [sssd PR#359][opened] CONFDB: Do not crash with an invalid domain_type value

[jhrozek]

   URL: https://github.com/SSSD/sssd/pull/359
Author: jhrozek
 Title: #359: CONFDB: Do not crash with an invalid domain_type value
Action: opened

PR body:
"""
If the domain_type parameter contained an invalid value, the error branch
wouldn't have set the 'ret' parameter to an error condition, which might
crash sssd.
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/359/head:pr359
git checkout pr359