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

[Stefano Lattarini]

commit 38799f27b49b8a8390e0afbdeff86ebfdb5425d7
Merge: 8290baa d63c932
Author:     Stefano Lattarini <address@hidden>
AuthorDate: Wed Mar 7 23:15:04 2012 +0100
Commit:     Stefano Lattarini <address@hidden>
CommitDate: Wed Mar 7 23:16:56 2012 +0100

    Merge branch 'master' into ng/master

    * master: (62 commits)
      cosmetics: fix repeated changelog entry heading
      tests: remove useless sleep from tests on remake rules
      news: describe recently-fixed bug in vala support
      depcomp: add support for IBM xlc/xlC compilers
      tests: do not clobber the $CC set by AM_PROG_CC_C_O
      tests: explicitly state that our lexers do not require unistd.h
      scripts: support -I <dir> -L <dir> and -l <lib> for cl in compile
      maint: drop 'Automake::Struct' module
      maint: require perl 5.6 throughout
      cosmetics: remove useless escaping for "'" character
      test defs: remove redundant and unused requirements
      tests: fix spurious failure on case-insensitive file systems
      news: more about planned backward incompatibilities
      maintcheck: fix few spurious failures
      tests: fix spurious failure due to exported MAKEINFO
      tests: fix spurious failure in a vala test
      self checks: relax tests on cleanup
      news: add entry about recent 'ar-lib' changes
      scripts: recognize the "q", "s" and "S" actions/modifiers in ar-lib
      tests: fix (harmless) botched merge
      ...

    + Extra non-trivial edits:

    * automake.in (lang_vala_finish_target): Don't pass $(AM_MAKEFLAGS)
    to recursive make invocations.