Merge branch 'maint'

* maint:
  coverage: vala support failing for VPATH from-scratch builds
  docs: report few more automake parsing limitations

diff --cc ChangeLog
Simple merge

diff --cc THANKS
Simple merge

diff --cc doc/automake.texi
Simple merge

diff --cc tests/Makefile.am
Simple merge

diff --cc tests/Makefile.in
Simple merge