[FS#3687] netifd always requires a netmask for IPv6 routes, even when it's only a single IP

[OpenWrt Bugs]

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

User who did this - Erik Tews (eriktews) 

Attached to Project - OpenWrt/LEDE Project
Summary - netifd always requires a netmask for IPv6 routes, even when it's only a single IP
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 - Usually when IPv4 routes are configured in OpenWRT, it's possible to specify a route for a single target IP such as:


config route
	option target '8.8.8.8'
	option gateway '192.168.2.3'
	option interface 'lan'


However, when you specify a route for IPv6, then you always have to specify a netmask, even when you only target a specific IP:


config route6
	option target '2001:4860:4860::8844/128'
	option table 'vpn'
	option gateway 'fe80::1'
	option interface 'lan'


I think the problem is somewhere around here: 


  * https://github.com/git-openwrt-org-mirror/netifd/blame/master/utils.c#L124
  * https://github.com/git-openwrt-org-mirror/netifd/blame/master/utils.c#L79

It would be nice when netifd would also allow just the IPv6 address without the trailing ///128// here, which would make the v4 an v6 routes a bit more consistent.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3687

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