admin: Support installing a kernel from the tree, default to it

The "protocol" here is rather lame; we just look for
/boot/vmlinuz-RELEASE and /lib/modules/RELEASE.  But good enough for
now.

src/triggers/triggers.d/0005depmod.trigger

@@ -0,0 +1,27 @@
+#!/bin/bash
+# Post-installation hook for kernel modules.  -*- mode: sh -*-
+#
+# Written by Colin Walters <walters@verbum.org>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 02111-1307, USA.
+
+set -e
+
+if test -x "$(which depmod 2>/dev/null)"; then
+    for d in /usr/lib/modules/*; do
+	if test -d "$d"; then depmod $(basename "$d"); fi
+    done
+fi