I noticed that, after an NFS install, the hostname in
/etc/sysconfig/network was always incorrectly set to
localhost.localdomain.  I assumed this was a bug and
decided to try to fix it.  I tracked the problem down to
this code in net.c:
    if (netc->manuallySet & NETINFO_HAS_HOSTNAME)
	fprintf(f, "HOSTNAME=%s\n", netc->hostname);
    else
	fprintf(f, "HOSTNAME=localhost.localdomain\n");

I don't know what to make of this.  I'm completely at a loss
for words.  I can't believe that it _is_ a bug, since the
code is explicitly written to avoid storing the hostname
in /etc/sysconfig/network when the hostname has been
reverse resolved (rather than manually entered.)  On the
other hand, I can't believe that it is _not_ a bug, since
it's so horribly wrong.

Well, you decide.