bug#56674: bug#58926: Shepherd becomes unresponsive after an interrupt

[Ludovic Courtès]

Hello!

Ludovic Courtès <ludo@gnu.org> skribis:

> These fresh Shepherd commits install a non-blocking ‘system*’ replacement:
>
>   975b0aa service: Provide a non-blocking replacement of 'system*'.
>   039c7a8 service: Spawn a fiber responsible for process monitoring.
>
> We’ll have to do more testing and probably go for a 0.9.3 release soon.

Shepherd commit ada88074f0ab7551fd0f3dce8bf06de971382e79 passes my
tests.  It definitely solves the wireguard example and similar things
(uses of ‘system*’ in service constructors/destructors); I can’t tell
for sure about nginx because I haven’t been able to reproduce it in a
VM.  I’m interested in ways to reproduce it.

It does look like we could go with 0.9.3 real soon now.

Ludo’.