2003-Dec-03

I committed support for BSD/OS for libtool and added new mk files and changes. In bsd.prefs.mk, get rid of possible "/" in OPSYS name and define LOWER_OPSYS for libtool use under BSD/OS. This was tested under BSDI BSD/OS 4.3.1. (Thank you D. Hege.) (Need to add BSDOS.x11.dist later.) I think FreeBSD needs similar libtool fixes.

Also, committed fixes so pkgsrc/mail/sendmail would build and install under BSD/OS.

Imported my shadow package to pkgsrc-wip. I started making it probably over a year ago.