i would prefer that it behaves like the update_vm_api sub in
PVE/API2/Qemu.pm (line ~1000)
there we have a parameter 'background_delay' which we could use to
make the removal async (this can already work in the gui)
and the return value is type string but optional, so
you could return undef witho
Previously, the web gui timed out when removing a
backup took long. Doing the main part of the API
DELETE call in a fork_worker solves this.
Signed-off-by: Dominic Jäger
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Thomas suggested returning undef on bugzilla. Returning "" is what seemed
closest to this while still being of return type
