Merge branch 'maint'

* maint:
  tests: fix a spurious failure with dash
  test defs: fix indentation (cosmetic change)
  tests: remove obsolete uses of $sh_errexit_works
  configure: search a sturdy POSIX shell to be used in the testsuite
  tests: shell running test scripts is now named AM_TEST_RUNNER_SHELL
  fixup: distribute t/README
  init: warn against obsolete usage of AM_INIT_AUTOMAKE

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

diff --cc Makefile.am
Simple merge

diff --cc NEWS
Simple merge

diff --cc automake.in
Simple merge

diff --cc configure.ac
Simple merge

diff --cc doc/automake.texi
Simple merge

diff --cc m4/init.m4
Simple merge

diff --cc t/backcompat3.sh
Simple merge

diff --cc t/list-of-tests.mk
Simple merge