Major infrastructure changes, part 2.

* Moved helpers, common and triggers dirs into xbps-src, where
  they belong.
* Renamed the templates dir to srcpkgs, it was so redundant before.
* Make it possible to add subpkgs with no restriction in names, for
  example udev now has a subpkgs called "libgudev". Previously
  subpkgs were named "${sourcepkg}-${pkgname}".
* xbps-src: changed to look for template files in current directory.
  That means that most arguments from the targets have been removed.
* xbps-src: added a reinstall target, to remove + install.
* xbps-src: do not overwrite binpkgs by default, skip them.

And more that I forgot because it's a mega-commit that I've been
working for some days already...

--HG--
extra : convert_revision : 0f466878584d1e6895d2a234f07ea1b2d1e61b3e

srcpkgs/initramfs-tools/files/hooks/busybox

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+PREREQ="klibc"
+
+prereqs()
+{
+	echo "$PREREQ"
+}
+
+case $1 in
+# get pre-requisites
+prereqs)
+	prereqs
+	exit 0
+	;;
+esac
+
+# Busybox
+. /etc/initramfs-tools/initramfs.conf
+
+if [ "${BUSYBOX}" = "n" ] || [ ! -e ${BUSYBOXDIR}/busybox ]; then
+	# those root need busybox
+	eval "$(mount | awk '/ \/ / {print "r_dev=" $1; exit}')"
+	if [ "${r_dev#/dev/mapper/}" != "${r_dev}" ]; then
+		echo "Warning: Busybox is required for successful boot!"
+	fi
+else
+	. /usr/share/initramfs-tools/hook-functions
+	rm -f ${DESTDIR}/bin/sh
+	rm -f ${DESTDIR}/bin/busybox
+	copy_exec ${BUSYBOXDIR}/busybox /bin/busybox
+	ln -s ${BUSYBOXDIR}/busybox ${DESTDIR}/bin/sh
+fi
+
+exit 0