Resolves: rhbz#1369130 - nss_sss should not link against libpthread
Resolves: rhbz#1392916 - sssd failes to start after update
Resolves: rhbz#1398789 - SELinux is preventing sssd from 'write' accesses
on the directory /etc/sssd
(cherry picked from commit eb6c560542266ec193ddd13c3b367dfa4361bc1f)