Fixes depth issue on some browsers
Revert "wl: Also restored RT-AC56U driver from 374_583"

This reverts commit a738f383139ba3287aa13ccda8101969b521b49b.
Revert "wl: Reverted RT-AC68U driver to 374_583 (attempting to fix random reboots)"

This reverts commit 81a9c11bbf9221da110d5f67de76cf63c6429636.

Conflicts:

	release/src-rt/version.conf
Reverted ufsd to 374_583 (fixes USB crashes)
Updated documentation
Merge pull request #558 from pinwing/master

Setting PPPoE MTU in web interface to 1500 did not work
Updated documentation
Merge branch 'master' of https://github.com/pinwing/asuswrt-merlin into test