[tlug] Speed up SSH/SFTP/Git/rsync/etc. on NTT fiber

[Andrew Todd <at+tlug@example.com>]

Hi TLUG,

I was down a rabbit hole the other day looking at contributors to Asahi 
Linux when I found this interesting information. It certainly seems to 
work for me.

> If you're in Japan, important PSA!
>
> Add this to your ~/.ssh/config:
>
> IPQoS none
>
> Turns out the default SSH QoS/DSCP setting puts you in a traffic 
class > that NTT FLET'S IPoE treats as priority, but limited to 10mbps!
>
> I was wondering why IPv6 rsync was so slow... (affects git push too!)
>
> Refs:
> https://tsutsui.hatenablog.com/entry/2024/10/17/013432
> https://qiita.com/tango110/items/c8194d43b46fa2a712d1
>
> Edit: To clarify, this only affects apps that override the default
> DSCP flag, like SSH. Most other IPv6 client apps don't.

Credit to https://vt.social/@lina/114528117147042684 for the above text.

Best,
Andrew