Import 1.4.13
Merge tag 'v1.4.13'

Conflicts:
	Makefile.in
	aclocal.m4
	configure
	doc/Makefile.in
	doc/m4.info
	doc/m4.info-1
	doc/m4.info-2
	doc/stamp-vti
	doc/version.texi
	examples/Makefile.in
	lib/Makefile.in
	lib/config.hin
	src/Makefile.in
	tests/Makefile.in