gnulib: sync with upstream.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
bootstrap: sync with upstream.

* bootstrap.conf: New file.
* gl/build-aux/bootstrap.in, gl/build-aux/extract-trace,
gl/build-aux/funclib.sh, gl/build-aux/options-parser: Update from
upstream to pick up recent improvements.
* bootstrap: Regenerate.
* ltdl/m4/gnulib-cache.m4: Regenerate.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
configury: don't install modules to pkglibexecdir.

Modern Automake (correctly) errors out when trying to install
modules to pkglibexecdir; we should be using pkglibdir here.
* Makefile.am (pkglibexec_LTLIBRARIES): Rename from this...
(pkglib_LTLIBRARIES): ...to this.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
configury: don't check in generated files.

* COPYING: Install explicitly to avoid confusion over M4 license.
* INSTALL, build-aux/compile, build-aux/config.guess,
build-aux/config.sub, build-aux/depcomp, build-aux/install-sh,
build-aux/mdate-sh, build-aux/missing, build-aux/texinfo.tex:
Remove.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
bootstrap: set copyright_holder explicitly.

* bootstrap.conf (copyright_holder): Explicitly set to the FSF.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
doc: use .texi extension consistently.

* doc/m4.texinfo: Rename from this...
* doc/m4.texi: ...to this.
* Makefile.am (m4_texinfo): Rename from this...
(m4_texi): ...to this. Adjust all callers.
* doc/Makeflie.am (m4_TEXINFOS): Adjust.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>
maint: move to gitlog-to-changelog.

* ChangeLog: Move from here...
* ChangeLog.old: ...to here.
* .gitignore: Add ChangeLog.
* ltdl/m4/gnulib-cache.m4: Add gitlog-to-changelog.
* Makefile.am (ChangeLog): New rule to generate a ChangeLog on
demand.
(EXTRA_DIST): Distribute gitlog-to-changelog.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>