initial import of dgpsip port

this is my first freebsd ports commit, so please let me know if I
missed something! _]:8)

astro/dgpsip/Makefile

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+# New ports collection makefile for:    dgpsip
+# Version required:			1.25
+# Date created:         		05 Jun 1999
+# Whom:                 		Daniel Baker <dbaker@freebsd.org>
+#
+# $Id$
+#
+
+DISTNAME=	dgpsip-1.25
+CATEGORIES=	astro
+MASTER_SITES=	http://www.wsrcc.com/wolfgang/ftp/
+
+MAINTAINER=     dbaker@freebsd.org
+
+DISTFILES=	dgpsip-1.25.tar.gz
+
+GNU_CONFIGURE=	YES
+
+.include <bsd.port.mk>

astro/dgpsip/distinfo

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+MD5 (dgpsip-1.25.tar.gz) = 515cf143904b3566223582c8df135c6e

astro/dgpsip/pkg-comment

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+differential GPS over IP communication device

astro/dgpsip/pkg-descr

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+On a stationary GPS without a differential correction signal, you
+should see a 20m average radius "drunken walk" pattern. On the same
+receiver with DGPS corrections and a good view of the sky, the
+error the same receiver with DGPS corrections and a good view of
+the sky, the error should be reduced to approximately 2m average
+radius. If you've always wanted to know exactly where your house
+is located without that annoying GPS "wander," but didn't want to
+spend the money for a DGPS radio, here is your big chance!
+
+I'd like to announce a fun DGPS hack. I've written a small Un*x
+server and client for redistributing DGPS correction signals over
+the Net. Basically the server grabs the serial byte stream from my
+DGPS radio and sends it off over a TCP connection. The client does
+the same thing but in reverse.  The result is that you can receive
+the local DGPS corrections from absolutely anywhere by using the
+Internet as the world's largest extension cord. You'll still  need
+to be within 1000 miles or so of San Francisco, California, USA
+for best results. However chances are better than not that the GPS
+error will stillb e reduced if you are 2000 to 3000 miles away.
+Several respondents from 2000 miles away have noted that the remote
+differenential signals have diminished the SA induced position and
+velocity errors by approximately 3x.

astro/dgpsip/pkg-plist

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+bin/dgpsip
+man/man1/dgpsip.1