[pve-devel] [RFC proxmox-ve/kernel-meta 00/15] ESP sync improvements

[Fabian Grünbichler]

move ESP sync and kernel autoremove snippets to pve-kernel-meta and
introduce a new binary package there, to allow easier sharing with
future PMG versions.

add a new pveesptool for formatting, initializing and refreshing synced
ESPs. various small improvements and cleanups to the hooks as well.

proxmox-ve needs a bump accordingly, see last patch for pve-kernel-meta.

There is probably lots of room for improvement, some areas for potential
follow-ups:
- 'pveesptool mount' and 'umount' commands (for manual configuration,
  cleanup, ...)
- 'pveesptool scan' to list ESPs that might be added to the list of
  synced ones
- 'pveesptool remove' to remove an ESP from the list (and clean up its
  contents?)
- more helpers in the functions file
- handle more edge/error case correctly in zz-pve-efiboot (there are
  surely still some missing)
- mktemp or something fancier for mountpoint directory creation, instead
  of easy-to-guess hardcoded ones

CC: Wolfgang Bumiller <w.bumiller at proxmox.com>

(especially for the last two points, which should be looked at before the
final release)