MIPS update and tree re-sync with GPL 2678 from RT-N16:
Cleaned a few prebuild/prebuilt paths to be in-sync with GPL.
Fixed out-of-sync code with GPL for u2ec
Fixed out-of-sync makefiles with GPL for nvram
toolchain: Added the 4.2.3 toolchain Asus now uses to compile the MIPS kernel.
I suspect this is so Broadcom-provided modules such as ctf will be compiled with
the same toolchain as the rest of the kernel.
toolchain: remove the Kernel 2.4 toolchain - we don't have any model based on Kernel 2.4
toolchain: remove unused symlink
Updated documentation
sqlite3: re-enabled threadsafe support.  This fixes minidlna no longer supporting inotify-based updates.  I assume Asus disabled threadsafe support for performance reason - it is also used by the TrendMicro DPI engine.
Updated documentation
webui: fix incorrect top margin and stretched font when enabling AiCloud
dpi: when the closed-source DPI engine restarts, it flushes part of the iptables, breaking the NAT loopback and probably other things as well.  This is an attempt to reapply all firewall rules in those DPI restart calls I was able to intercept in the open-source parts.  Unsure if these are enough.
Bumped revision to alpha 3
Reverting threadsafe support - causes httpd to crash.  Asus will have to sort this out, I can't since bwdpi_sqlite is closed source.
Revert "sqlite3: re-enabled threadsafe support.  This fixes minidlna no longer supporting inotify-based updates.  I assume Asus disabled threadsafe support for performance reason - it is also used by the TrendMicro DPI engine."

This reverts commit 5789f9c24c956d4cc8997232254d23ba94017303.
Reverting the attempt at fixing the firewall rules that are flushed by the DPI engine since other things related to DPI are completely breaking the NAT loopback code - both mine and Asus's own).
Revert "dpi: when the closed-source DPI engine restarts, it flushes part of the iptables, breaking the NAT loopback and probably other things as well.  This is an attempt to reapply all firewall rules in those DPI restart calls I was able to intercept in the open-source parts.  Unsure if these are enough."

This reverts commit 4a431885671ee5c045d2a9985835127b1de42fd0.
firewall: revert to Asus's own NAT loopback for now - it's (only) partly broken at the moment, while ours doesn't work at all anymore
firewall: fixed incorrect GPL merge related to PPTPD CTF bypass, and ip6tables handling of new IPv6 connections on MIPS
firewall: synced formatting with GPL code for easier maintaining; fixed url filtering/keyword filtering support when CTF is enabled
firewall: re-added missing variable used by Asus's NAT loopback code
firewall: remove disabled code that was completely removed from GPL
MIPS: Fix hardcoded path to KERNELCC
Merge pull request #744 from saintdev/toolchain

MIPS: Fix hardcoded path to KERNELCC
Merge pull request #7 from RMerl/master

update