[FS#1187] sysupgrade does not accept -d any more

[LEDE Bugs]

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

User who did this - JamesT42 (JamesT42) 

Attached to Project - LEDE Project
Summary - sysupgrade does not accept -d any more
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Hi!

I'm on git master code from 2017-10-29 (plus minus a few days) and trying to update using sysupgrade with a delay, like I use to do before in CC. But -d is no accepted any more,  though it is included in the help.
Its on an Archer C60, but I dont think that relevant.

 root at LEDE:~# sysupgrade
Usage: /sbin/sysupgrade [...] 
       /sbin/sysupgrade [-q] [-i]  

upgrade-option:
        -d    add a delay before rebooting
[...]

root at LEDE:~# sysupgrade -d 10 -T lede-6.1-ar71xx-generic-archer-c60-v1-squashfs-sysupgrade.bin
Invalid option: -d


More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1187