nss_compat still deprecated?

[Florian Weimer]

Did we un-deprecate nss_compat?  Should we?

Since this commit:

commit 64d1e08ea822bf47cb2796ad0f727136227f983c
Author: Andreas Schwab <schwab@suse.de>
Date:   Mon Oct 2 14:30:46 2017 +0200

    Move nss_compat from nis to nss subdir and install it unconditionally
    
    This has been tested that local lookup still works with and
    without an installed libnss_nis, and that NIS lookup works when
    libnss_nis is available.

it is no longer necessary to deprecate nss_compat because there is no
strong (non-configurable) NIS dependency anymore.

If we un-deprecate nss_compat, we should add a note to NEWS (both for
2.28 and 2.27.1).