wip/xplanet: Apply feedback from Greg.

xplanet/Makefile

@@ -1,5 +1,8 @@
 # $NetBSD: Makefile,v 1.90 2019/08/11 15:38:22 ng0 Exp $
 
+# The 1.3.1 release is a few years old, and upstream recommends that
+# the head of svn be used.  However, we follow pkgsrc norms of
+# packaging releases, with some commits applied as patches.
 DISTNAME=	xplanet-1.3.1
 CATEGORIES=	x11
 MASTER_SITES=	${MASTER_SITE_SOURCEFORGE:=xplanet/}

xplanet/TODO

@@ -1,2 +0,0 @@
-configure: WARNING: *** Native PNM support will not be included ***
-configure: WARNING: *** Xplanet will be built without SPICE support ***

xplanet/distinfo

@@ -13,4 +13,4 @@ SHA1 (patch-src_libmultiple_RayleighScattering.cpp) = 3a64033dc0c6915c9cd2eed2e5
 SHA1 (patch-src_libmultiple_drawStars.cpp) = b6a3f3995f4f1ac77660fdad64524ef6a48c4d50
 SHA1 (patch-src_readConfig-fixclang.cpp) = d24cfc6f832e9445f8c968a75e4eb0a7688b0c84
 SHA1 (patch-src_readConfig.cpp) = c1a46209dfcbb6a37b6c7ff90f633a6450fbd5d9
-SHA1 (patch-src_xpUtil-Add2017LeapSecond.cpp) = 1c0842e391f92daa86fb89caa4f19be29c6ea37b
+SHA1 (patch-src_xpUtil-Add2017LeapSecond.cpp) = 6b48a78f29b441ebdcdd097d01d5479e3afc8edc

xplanet/patches/patch-src_xpUtil-Add2017LeapSecond.cpp

@@ -1,11 +1,8 @@
 $NetBSD$
 
-pick from https://sourceforge.net/p/xplanet/code/209/
 Add 2017 leap second
+Taken from upstream: https://sourceforge.net/p/xplanet/code/209/
 
-Upstream maintainer recommended to build from svn. The latest
-release is rather old, so we pick a couple of commits required
-for functionality on top of this release.
 
 --- src/xpUtil.cpp~
 +++ src/xpUtil.cpp