Have our docgen tool generate a synopsis for the prune.cfg schema, and
use that output in a new prune.cfg manpage, and include it in the
appropriate appendix of our html/pdf rendered admin guide.
Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
[TL: expand commit message and keep alphabetical order for configs in
the guide.]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
