Show the basename of the program in help output, not the full path.

Same patch already applied upstream.
ok sthen@

devel/cvs2svn/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.1.1.1 2009/08/22 11:46:24 sthen Exp $
+# $OpenBSD: Makefile,v 1.2 2009/09/04 20:54:11 stsp Exp $
 
 COMMENT=		migrate repositories from CVS to Subversion/GIT
 
@@ -6,6 +6,7 @@ COMMENT=		migrate repositories from CVS to Subversion/GIT
 # otherwise you probably get the old files, not 404.
 MODPY_EGG_VERSION=	2.2.0
 DISTNAME=		cvs2svn-${MODPY_EGG_VERSION}
+PKGNAME=		${DISTNAME}p0
 MASTER_SITES=		${HOMEPAGE}files/documents/1462/44372/
 
 CATEGORIES=		devel

devel/cvs2svn/patches/patch-cvs2svn

@@ -0,0 +1,19 @@
+$OpenBSD: patch-cvs2svn,v 1.1 2009/09/04 20:54:22 stsp Exp $
+--- cvs2svn.orig	Sun Nov 23 08:10:57 2008
++++ cvs2svn	Fri Sep  4 21:12:04 2009
+@@ -23,12 +23,14 @@ if sys.hexversion < 0x02040000:
+   sys.stderr.write("ERROR: Python 2.4 or higher required.\n")
+   sys.exit(1)
+ 
++import os
++
+ from cvs2svn_lib.common import FatalException
+ from cvs2svn_lib.main import main
+ 
+ 
+ try:
+-  main(sys.argv[0], sys.argv[1:])
++  main(os.path.basename(sys.argv[0]), sys.argv[1:])
+ except FatalException, e:
+   sys.stderr.write(str(e) + '\n')
+   sys.exit(1)