Merge branch 'maint'

Merge branch 'maint'

* maint:
  automake: typofix in comments: s/AC_CONFIG_HEADER/AC_CONFIG_HEADERS/
  am: prefer a shorter idiom where possible
  cosmetics: fix few typos, grammaros and missing whitespace
  fixup: remove an obsolete comment
  docs: we still don't have the promised better Java interface
  build: move automake and aclocal in 'bin' subdir
  build: break up monolithic Makefile.am in subdir-specific fragments

+ Extra non-trivial edits:

* m4/Makefile.inc (dist_automake_ac_DATA): Drop lead-dot.m4 and
mkdirp.m4.
* lib/Automake/Makefile.inc (dist_perllib_DATA): Drop Configure_ac.pm.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>