unmaintained/shadow: update to 4.2.1

This version has subuid/subgid support so unprivileged LXC containers
are possible:

http://www.stgraber.org/2014/01/17/lxc-1-0-unprivileged-containers/

unmaintained/shadow/APKBUILD

 # Contributor: William Pitcock <nenolod@dereferenced.org>
-# Maintainer:
+# Maintainer: Stuart Cardall <developer@it-offshore.co.uk>
 pkgname=shadow
-pkgver=4.1.4.3
-pkgrel=4
-pkgdesc="PAM-using login and passwd utilities"
+pkgver=4.2.1
+pkgrel=0
+pkgdesc="PAM-using login and passwd utilities (usermod / useradd / newuidmap etc)"
 url="http://pkg-shadow.alioth.debian.org/"
 arch="all"
 license="GPL"
@@ -12,7 +12,7 @@ depends_dev="linux-pam-dev"
 makedepends="$depends_dev"
 install="$pkgname.post-upgrade $pkgname.post-deinstall"
 subpackages="$pkgname-doc"
-source="http://pkg-shadow.alioth.debian.org/releases/shadow-$pkgver.tar.bz2
+source="http://pkg-shadow.alioth.debian.org/releases/shadow-$pkgver.tar.xz
 	login.pamd"
 
 _builddir="$srcdir"/shadow-$pkgver
@@ -54,5 +54,9 @@ package() {
 	touch "$pkgdir"/etc/login.defs
 }
 
-md5sums="b8608d8294ac88974f27b20f991c0e79  shadow-4.1.4.3.tar.bz2
+md5sums="2bfafe7d4962682d31b5eba65dba4fc8  shadow-4.2.1.tar.xz
 72dfc077a61ab7163e312640cc98bba8  login.pamd"
+sha256sums="3b0893d1476766868cd88920f4f1231c4795652aa407569faff802bcda0f3d41  shadow-4.2.1.tar.xz
+c0d0f2f77133b0663c5a578afeba45d5a9c703ff6f3f6aba3727dfe01877dac0  login.pamd"
+sha512sums="7a14bf8e08126f0402e37b6e4c559615ced7cf829e39156d929ed05cd8813de48a77ff1f7f6fe707da04cf662a2e9e84c22d63d88dd1ed13f935fde594db95f0  shadow-4.2.1.tar.xz
+46a6f83f3698e101b58b8682852da749619412f75dfa85cecad03d0847f6c3dc452d984510db7094220e4570a0565b83b0556e16198ad894a3ec84b3e513d58d  login.pamd"