Update mit-pthreads for 1.3H signal changes on alpha and i386.
Update mit-pthreads for 1.3/1.3H on sparc (from 1.1 version).
Enable building the server on sparc.
Add mit-pthreads support for 1.3/1.3H on arm32. (Server doesn't work yet.)
Fix two bugs in mit-pthreads with functions returning off_t's.
- New, optional Makefile variable HOMEPAGE, specifies a URL for
the home page of the software if it has one.
- The value of HOMEPAGE is used to add a link from the
README.html files.
- pkglint updated to know about it. The "correct" location for
HOMEPAGE in the Makefile is after MAINTAINER, in that same
section.
