pkgin: Update to 23.8.0.

## Version 23.8.0 (2023-08-16)

This is the biggest overhaul of pkgin yet!  As well as fixing many bugs, pkgin
23.8.0 runs "pkgin -n upgrade" over 2,000x faster on a test system with 12,663
packages installed compared to 22.10.0 (1.4 seconds vs over 54 minutes).

 * Large overhaul of dependency resolution code, fixing many upgrade issues,
   providing significant performance improvements, and improving code and
   logic readability.

 * Add support for SUPERSEDES.

 * Fix install and removal ordering.

 * Improve and fix handling of "keep" packages, using "pkg_add -A" to
   correctly install automatic packages rather than applying keep or unkeep
   flags afterwards.

 * Output improvements, sorting packages alphabetically and providing a
   simple progress counter.  Fix unwanted output that could end up mixed
   with package paths in "pkgin export".

 * Correct handling of +REQUIRED_BY for reverse dependencies, fixing
   DEPENDS that use alternate matches.

 * Many internal code improvements, memory leaks plugged, and compiler
   warnings eradicated.

Fixes at least the following issues:

 * NetBSDfr/pkgin#10
 * NetBSDfr/pkgin#44
 * NetBSDfr/pkgin#79
 * NetBSDfr/pkgin#95
 * NetBSDfr/pkgin#97
 * NetBSDfr/pkgin#110
 * NetBSDfr/pkgin#113
 * NetBSDfr/pkgin#128
 * NetBSD PR#51465
 * NetBSD PR#56683

pkgtools/pkgin/Makefile

@@ -1,7 +1,6 @@
-# $NetBSD: Makefile,v 1.124 2023/04/19 08:11:16 adam Exp $
+# $NetBSD: Makefile,v 1.125 2023/08/16 17:19:55 jperkin Exp $
 
-DISTNAME=		pkgin-22.10.0
-PKGREVISION=		2
+DISTNAME=		pkgin-23.8.0
 CATEGORIES=		pkgtools
 MASTER_SITES=		${MASTER_SITE_GITHUB:=NetBSDfr/}
 GITHUB_TAG=		v${PKGVERSION_NOREV}

pkgtools/pkgin/distinfo

@@ -1,5 +1,5 @@
-$NetBSD: distinfo,v 1.77 2022/10/05 17:23:02 jperkin Exp $
+$NetBSD: distinfo,v 1.78 2023/08/16 17:19:55 jperkin Exp $
 
-BLAKE2s (pkgin-22.10.0.tar.gz) = 00f661002765ded1de7e7b6a643de34db15660806efa673f7a1e3f8f2ef82bb8
-SHA512 (pkgin-22.10.0.tar.gz) = 1c57ccac6cb5d82ad5e029aefe14f3f8d8a474ccb3a597541c0c7546fa7dec14f6908234a724de17ab8d594111a9043c5be54a4a3ede27bfa73942ddcfd440e6
-Size (pkgin-22.10.0.tar.gz) = 249449 bytes
+BLAKE2s (pkgin-23.8.0.tar.gz) = d658892b9c47479c841c97ad30bf52058a9acd90e6f13a6310668d472e203274
+SHA512 (pkgin-23.8.0.tar.gz) = 9ca00a238a0a379984743b3196a86ebde47c751a0c5d26fe219ab313e6b142bec2fdcd19b0675328dd048d449b9c59c685dc015b1ea771920accb95a280c6368
+Size (pkgin-23.8.0.tar.gz) = 266927 bytes