[SSSD] [sssd PR#324][opened] MAN: Improve description of 'trusted domain section' in sssd.conf's man page

[amitkumar50]

URL: https://github.com/SSSD/sssd/pull/324
Author: amitkumar50
 Title: #324: MAN: Improve description of 'trusted domain section' in sssd.conf's man page
Action: opened

PR body:
"""
PR generated to include explaination for ipa ad trust sssd configuration where ad has a child domain. Explanation is added to 'TRUSTED DOMAIN SECTION'. Also an example is included to better understanding.

Resolves: https://pagure.io/SSSD/sssd/issue/3399
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/324/head:pr324
git checkout pr324