[FS#1229] mwan3 not starting due to missing '/usr/bin/ip' command [solved by creating a symlink]

[LEDE Bugs]

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

User who did this - atrent (atrent) 

Attached to Project - LEDE Project
Summary - mwan3 not starting due to missing '/usr/bin/ip' command [solved by creating a symlink]
Task Type - Bug Report
Category - Packages
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details -  - Steps to reproduce
   
Device: Linksys WRT1900AC
LEDE version: LEDE Reboot 17.01.4 r3560-79f57e422d / LuCI lede-17.01 branch (git-17.315.61305-a9bddc4)

Trying to start mwan3 (configured correctly, I just restored an older config from OpenWrt 15, I'm upgrading from Openwrt to LEDE) does not  give any feedback, i.e.:

# mwan3 start
#

echoing $? gives nr. 4 (ip not found), in fact the 'ip' command is in /usr/sbin instead of /usr/bin where the mwan startup script expects it

Solution/patch: create symlink to /usr/sbin/ip in /usr/bin, i.e.:

# ln -s /usr/sbin/ip /usr/bin

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1229