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

[Stefano Lattarini]

commit aee79c539713a13e4e904d2acda938d5661337e0
Merge: eaed46c 7a57be3
Author: Stefano Lattarini <address@hidden>
Date:   Wed May 29 13:08:59 2013 +0200

    Merge branch 'master' into ng/master

    * master:
      tests: avoid a spurious failure when $CC != cc
      NEWS: drop an idiomatic use of latinism 'sic'
      NEWS: fix typos and grammaros
      NEWS: fix Automake versions
      NEWS: document fix for bug#14441
      Automake::Rule: consistently prepend underscore to private variables
      Automake::Rule: rename: suffix_rule() -> next_in_suffix_chain()
      Automake::Rule: adjust comments and POD according to previous changes
      Automake::Rule: make private variables lexically scoped
      suffix rules: better distinction between builtin and user-derived
      Automake::Rule: expose suffix rules as a function, not a scalar
      tests: expose automake bug#14441

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

    + Extra non-trivial changes:

    * bin/automake.in, lib/Automake/Rule.pm: Drop changes related to
    user-defined source extensions, that are not supported in Automake-NG
    (see section "Source Files with Unknown Extensions" in NG-NEWS for
    details).
    t/suffix-custom-pr14441.sh: Remove, since this script tested features
    related to user-defined source.