Import 2.19.5
Merge branch 'vendor'

Conflicts:
	Makefile.in
	aclocal.m4
	acx_prog_cc_optim.m4
	config.h.in
	configure
	configure.ac
	man/Makefile.in
	man/sex.1
	src/Makefile.am
	src/Makefile.in
	src/analyse.c
	src/back.c
	src/catout.c
	src/define.h
	src/field.c
	src/fits/Makefile.in
	src/fits/fitsbody.c
	src/fits/fitscat.h
	src/fits/fitscat_defs.h
	src/fits/fitscleanup.c
	src/fits/fitshead.c
	src/fits/fitskey.c
	src/fits/fitsmisc.c
	src/fits/fitsutil.c
	src/fits/fitswrite.c
	src/main.c
	src/makeit.c
	src/param.h
	src/preflist.h
	src/prefs.c
	src/psf.c
	src/readimage.c
	src/sexheadsc.h
	src/types.h
	src/wcs/Makefile.in

Note MEF handling features removed. These may work in vanilla.
Fix up to build. Reverted some changes back to vendor source
and regenerated build system.
Make sure PCi_j keywords are found
More regenerated files