Import xl2tpd

Use sources on github and add myself as maintainer.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

net/xl2tpd/README

@@ -0,0 +1,23 @@
+OpenWRT Package for xl2tpd
+
+xl2tpd is a development from the original l2tpd package originally written by
+Mark Spencer, subsequently forked by Scott Balmos and David Stipp, inherited
+by Jeff McAdams, modified substantially by Jacco de Leeuw and then forked 
+again by Xelerance (after it was abandoned by l2tpd.org).
+
+Rationale for inclusion in OpenWRT:
+
+l2tpd has some serious alignment problems on RISC platforms. It also runs 
+purely in userspace.
+
+Some of the features added in this fork include:
+
+1. IPSec SA reference tracking inconjunction with openswan's IPSec transport
+   mode, which adds support for multiple clients behind the same NAT router
+	 and multiple clients on the same internal IP behind different NAT routers.
+
+2. Support for the pppol2tp kernel mode L2TP.
+
+3. Alignment and endian problems resolved.
+
+hcg