Merge GUI updates from AdvancedTomato-V2 (Jacky)
RTN66: remove unnecessary vlan port mapping
GUI: Missed at_navi nvram setting
- Allowed the IPv6 Forwarding page to allow more fancy subnets & rules.
	For example I need the following destination address
	::e269:95ff:fe91:8683/::ffff:ffff:ffff:ffff).
- Changed the DNSMASQ config a bit for SLAAC & DHCPv6 and added an
	option to select them in the GUI. (more info about the differences
	you can find on my blog (http://blog.dupondje.be).

Conflicts:
	release/src/router/rc/services.c
	release/src/router/www/advanced-dhcpdns.asp
	release/src/router/www/forward-basic-ipv6.asp
	release/src/router/www/tomato.js
Replace local dnsmasq with a submodule and update to 2.72.
Build cleanup (nasty commit, sorry).

* Update dnscrypt and libevent autoconf files.
* Patch Aria2 to build without docs (eliminates build dep)
* Misc tweaks to the router makefile
GUI: Merge updates from AdvancedTomato-V2 (Jacky)