[Automake-ng] [FYI] Merge branch 'master' into ng/master

[Stefano Lattarini]

commit 20c1d7d7ff68c8351fd8bb953371012168240279
Merge: f94310a 171a31b
Author: Stefano Lattarini <address@hidden>
Date:   Fri Apr 13 18:41:20 2012 +0200

    Merge branch 'master' into ng/master

    * master:
      build: use slightly older help2man, for improved portability
      tests: avoid spurious failure when 'install-info' program is unavailable
      install: shell parameter expansions can be used in directory names
      test defs: more environment cleanups
      test defs: unset 'AM_UPDATE_INFO_DIR' environment variable
      build: generate doc/*.1 files; include help2man
      build: avoid parallel build failures

    Signed-off-by: Stefano Lattarini <address@hidden>