[FS#996] At boot /etc/hotplug scripts are not triggered by kernel events

[LEDE Bugs]

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

User who did this - Adrian (hpapagaj) 

Attached to Project - LEDE Project
Summary - At boot /etc/hotplug scripts are not triggered by kernel events
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - All
Due in Version - Undecided
Due Date - Undecided
Details - At boot /etc/hotplug.d scripts are not triggered by kernel events.
If we have a HDD/usb printer atached to an usb port, at boot, those scripts are not executed. However when we add/remove it later, after boot those scripts are executed properly. 

Same problem as here:

[[https://dev.openwrt.org/ticket/18116|https://dev.openwrt.org/ticket/18116]]

I am using this hotplug script:

https://www.all4os.com/router/add-multiple-usb-printers-to-openwrt-firmware-router-via-p910nd-using-hotplug.html

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=996