* Makefile.in (cygwin-ug-net/cygwin-ug-net.pdf): Process input via
	xsltproc and fop.
	(cygwin-api/cygwin-api.pdf): Ditto.
	* fo.xsl: New file.
* exceptions.cc (signal_exit): Nope.  Nevermind.  Dump core unconditionally.
* exceptions.cc (signal_exit): Remove comment.  Use __builtin_frame_address.
	* Makefile.in (cygwin-ug-net/cygwin-ug-net.html): Add dependency to
	cygwin.xsl.
	(cygwin-api/cygwin-api.html): Ditto.
	(cygwin-ug-net/cygwin-ug-net.pdf): Add dependency to fo.xsl.
	(cygwin-api/cygwin-api.pdf): Ditto.
	(cygwin-api.xml): Drop "." path component from doctool dependency.
	Change Makefile to Makefile.in dep.
	(doctool): Drop "." path component from target.