[SSSD] [PATCH] Write SELinux config files in responder instead of PAM module

[Jan Zelený]

Without this change, a process linking our PAM module would do the writing. 
That could be potentially problematic because everych such process will 
probably have its own selinux context. That would need rule in the policy for 
every process that is linked with PAM modules.

With this change, the context of process writing to the config file will be 
sssd_t, which makes life easier for SELinux policy maintainers.

Thanks
Jan