bug#73306: guix deploy fails with dropbear ssh server

[Attila Lendvai]

this seems to be an upstream regression:

https://github.com/mkj/dropbear/issues/321

i can see the same failing assert in my server's /var/log/secure when i
try to `guix deploy` to it:

Failed assertion (src/common-channel.c:705): `!channel->sent_close'

<#secure method=pgpmime mode=sign>
-- 
• attila lendvai
• PGP: 963F 5D5F 45C7 DFCD 0A39
--
“Many abused children cling to the hope that growing up will bring escape and 
freedom.
But the personality formed in the environment of coercive control is not well 
adapted to adult life. The survivor is left with fundamental problems in basic 
trust, autonomy, and initiative. She approaches the task of early 
adulthood―establishing independence and intimacy―burdened by major impairments 
in self-care, in cognition and in memory, in identity, and in the capacity to 
form stable relationships.
She is still a prisoner of her childhood; attempting to create a new life, she 
reencounters the trauma.”
        — Judith Lewis Herman (1942–)