[FS#1191] uclient's wget fails to try all available IP addresses

[LEDE Bugs]

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

User who did this - Brian J. Murrell (brianjmurrell) 

Attached to Project - LEDE Project
Summary - uclient's wget fails to try all available IP addresses
Task Type - Bug Report
Category - Other
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - lede-17.01
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - Device problem occurs on
N/A

 - Software versions of LEDE release, packages, etc.
17.01.4

 - Steps to reproduce
$ host downloads.lede-project.org 
downloads.lede-project.org is an alias for downloads2.lede-project.org. 
downloads2.lede-project.org has address 148.251.78.235 
downloads2.lede-project.org has IPv6 address 2a01:4f8:202:43ea::3

[ use iptables, or ip route to block access to the IPv6 address ]
 
$ wget 'http://downloads.lede-project.org/releases/17.01.4/packages/mips_24kc/base/Packages.gz' 
Connecting to 2a01:4f8:202:43ea::3:80 
Connection error: Connection failed 

So why does it not also try 148.251.78.235?

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=1191