[FS#349] mwan3 is broken with virtual ifaces

[LEDE Bugs]

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

User who did this - Kyle Sanderson (KyleSanderson) 

Attached to Project - LEDE Project
Summary - mwan3 is broken with virtual ifaces
Task Type - Bug Report
Category - Packages
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on
All
 - Software versions of LEDE release, packages, etc.
Trunk
 - Steps to reproduce
Create a tun iface, use mwan3.
 - When did it last work?
Chaos Calmer.

Asked by Rich B to file here https://forum.lede-project.org/t/criteria-for-first-lede-stable-release/552/33

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=349