Configure SELinux for httpd during upgrades
    
    SELinux configuration for httpd instance was set for new
    installations only. Upgraded IPA servers (namely 2.1.x -> 2.2.x
    upgrade) missed the configuration. This lead to AVCs when httpd
    tries to contact ipa_memcached and user not being able to log in.
    
    This patch updates ipa-upgradeconfig to configure SELinux
    in the same way as ipa-server-install does.
    
    https://fedorahosted.org/freeipa/ticket/2603