Merge branch 'user-recursive-targets'

* user-recursive-targets:
  recursion: support user-defined recursive targets
  tests: rename 'recurs*.sh' to 'var-recurs*.sh'
  tests: minor improvements to 'recurs*.sh'

diff --cc Makefile.am
Simple merge

diff --cc NEWS
Simple merge

diff --cc automake.in
Simple merge

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