[bz 22342] patch: fix netgroup cache keys

[DJ Delorie]

"Carlos O'Donell" <carlos@redhat.com> writes:
> Why is this correct?

As noted in the referenced BZ, this is the only key in the database that
doesn't include its trailing NUL.  In this particular case, it's
problematic because there are *two* types of entries in the netgroup
cache, and when the keys don't match the cache aging and timeouts don't
work right.

> Please post a v2 with the commit message you intend to use
> please.

Will do.