Merge branch 'maint' into branch-1.11

Merge branch 'maint' into branch-1.11

* maint:
  tests: fix spurious failure on systems lacking unistd.h
  test defs: hack to support autoconf-wrapper programs
  tests: fix a minor spurious failure with FreeBSD make
  tests: make two test scripts executable
  readme: reference webpages for automake mailing lists
  readme: update advice about testsuite execution
  readme: don't reference the old homepage at sources.redhat.com
  hacking: some more fixlets
  * NEWS: Fix typo in 'make dist-bzip2' description.