Merge branch 'maint' into branch-1.11

* maint:
  tests: avoid spurious failure of 'transform2.test' on Cygwin
  tests: avoid spurious failure of deleted-am.test with FreeBSD make
  tests: avoid possibly undeserved PASS from check8.test
  warnings: more precise category and message for one warning
  release: revamp rules to tag and upload the releases
  amversion: add missing dependency
  hacking: update advice w.r.t. synced files
  hacking: don't reference ChangeLog anymore

diff --cc HACKING
Simple merge

diff --cc automake.in
Simple merge

diff --cc m4/Makefile.am
Simple merge

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