20 clean-up csets on "next"

[Jim Meyering]

Hi,

I've just pushed 20 c-sets to next, here:

  http://git.savannah.gnu.org/gitweb/?p=grep.git;a=shortlog;h=refs/heads/next

Overall summary: use more bits from gnulib and enable some of
its syntax-checks (several more to go, see cfg.mk for the list).

Object now if you see anything you don't like.
Here's the summary:

      maint: list gnulib modules one per line
      maint: generate ChangeLog from git logs
      build: update gnulib submodule to latest
      build: get more lib/* files from gnulib, adjust savedir
      build: adapt to the newer exclude API we now get from gnulib
      build: adapt to the newer closeout module from gnulib
      build: add several build- and release-related gnulib modules
      build: use git-version-gen for inter-release version strings
      build: require automake-1.11, enable silent-rules, parallel tests, xz
      maint: disable the many failing syntax-checks
      maint: enable immutable_NEWS check
      maint: enable "file system" check
      maint: use gnulib's progname module; enable set_program_name check
      maint: enable require_config_h checks
      maint: enable unmarked_diagnostics check
      maint: enable trailing_blank check
      maint: enable makefile @...@ check
      maint: remove now-generated file: po/Makefile.in.in
      maint: enable makefile_path_separator check
      maint: enable two checks

Tomorrow I'll pull everything onto master and remove next.