dropbear: imported (and enhanced) mnmeosyne code to inject authorized_keys from config/$config

pkg_dropbear.conf

@@ -0,0 +1,35 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: target/idunn/pkg_dropbear.conf
+# Copyright (C) 2008 The OpenSDE Project
+# Copyright (C) 2002 - 2006 Alejandro Mery
+#
+# More information can be found in the files COPYING and README.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+. $confdir/$pkg.conf
+
+idunn_adminkeys="$base/config/$config/authorized_keys"
+
+if [ -s "$idunn_adminkeys" ]; then
+	hook_add postmake 5 'pkg_dropbear_authkeys'
+
+	pkg_dropbear_authkeys() {
+		local sshdir="$xroot/root/.ssh" ak=
+		ak="$sshdir/authorized_keys"
+
+		mkdir -p "$sshdir"
+		chmod 700 "$sshdir"
+		cp "$idunn_adminkeys" "$ak"
+		chmod 600 "$ak"
+		add_flist "$sshdir" "$ak"
+	}
+else
+	abort "idunn: ${idunn_adminkeys#$base/} missing!"
+fi