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

templates/initramfs-tools/files/hooks/module_init_tools

@@ -1,29 +0,0 @@
-#!/bin/sh
-
-PREREQ=""
-
-prereqs()
-{
-	echo "$PREREQ"
-}
-
-case $1 in
-# get pre-requisites
-prereqs)
-	prereqs
-	exit 0
-	;;
-esac
-
-. /usr/share/initramfs-tools/hook-functions
-
-copy_exec /sbin/modprobe /sbin
-copy_exec /sbin/depmod /sbin
-copy_exec /sbin/rmmod /sbin
-
-if [ -d /etc/modprobe.d ]; then
-	mkdir -p "${DESTDIR}/etc/modprobe.d"
-	cp -a /etc/modprobe.d/* "${DESTDIR}/etc/modprobe.d/"
-fi
-
-exit 0