Bumped revision to 376.50 alpha 1
wl: Updated driver to 376_3657 version (RT-AC56)
revert version count to 376.49_3 as we might need another point release
webui: add missing GPL merge which caused a few issues on this page
webui: fix check on whether the Advertize DNS setting should be shown (3677 regression)
rc: disable FA mode if CTF is automatically disabled by an incompatible feature (such as Traditional QoS)

This issue was introduced in GPL 3602, and could lead to a boot loop.
Updated documentation
Merge branch 'master' of https://github.com/RMerl/asuswrt-merlin