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/tcp_wrappers/files/hosts.allow

@@ -0,0 +1,10 @@
+#
+# hosts.allow	This file contains access rules which are used to
+#		allow or deny connections to network services that
+#		either use the tcp_wrappers library or that have been
+#		started through a tcp_wrappers-enabled xinetd.
+#
+#		See 'man 5 hosts_options' and 'man 5 hosts_access'
+#		for information on rule syntax.
+#		See 'man tcpd' for information on tcp_wrappers
+#

srcpkgs/tcp_wrappers/files/hosts.deny

@@ -0,0 +1,18 @@
+#
+# hosts.deny	This file contains access rules which are used to
+#		deny connections to network services that either use
+#		the tcp_wrappers library or that have been
+#		started through a tcp_wrappers-enabled xinetd.
+#
+#		The rules in this file can also be set up in
+#		/etc/hosts.allow with a 'deny' option instead.
+#
+#		See 'man 5 hosts_options' and 'man 5 hosts_access'
+#		for information on rule syntax.
+#		See 'man tcpd' for information on tcp_wrappers
+#
+#
+# The portmap line is redundant, but it is left to remind you that
+# the new secure portmap uses hosts.deny and hosts.allow.  In particular
+# you should know that NFS uses portmap!
+#