libidn add-on into main glibc.tar

[Roland McGrath <roland at redhat dot com>]

I would like to start including the libidn/ add-on directory in the main
glibc source distribution tar files.  Does anyone see a problem with this?

I assume that the reason it's been kept separate before is because of its
non-FSF copyright owner.  I wasn't keeping track of these things at the
time libidn went into libc.  Last time I knew the GNU policy for libc was
to badly want everything in it FSF-owned.  I thought that was GNU policy
for GNU things generally, but GNU Libidn is a GNU thing now and has that
copyright owner, so I guess that is OK by GNU.

The only practical effect for users would be that unpacking glibc-N.tar
alone and using configure --enable-add-ons would now catch libidn as well
as nptl, whereas before tar-unpacking builders would have had to unpack
glibc-libidn-N.tar too and move it in and/or use --enable-add-ons=blah,blah.
I assume this is no problem at all for anyone in reality.  All hackers who
build from checkouts and use plain --enable-add-ons get this already.

The reason to want to do this (and now) is that it would let us use a
simple 'git archive' method for creating the official GNU tar files
for libc releases.


Thanks,
Roland