[FS#1041] Auto channel selection chooses 1 with HT40 enabled

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Luke Dashjr (luke-jr) 

Attached to Project - LEDE Project
Summary - Auto channel selection chooses 1 with HT40 enabled
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - With WZR-600DHP running LEDE Reboot / 17.01.2, if I set htmode to HT40 and leave channel set to auto, LEDE chooses channel 1, which is apparently not allowed for HT40 per strict specification.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1041