contrib; dracut: centralise root= parsing, actually support root=s

So far, everything parsed root= manually, which meant that while
zfs-parse.sh was updated, and supposedly supported + -> ' ' conversion,
it meant nothing

Instead, centralise parsing, and allow:
  root=
  root=zfs
  root=zfs:
  root=zfs:AUTO

  root=ZFS=data/set
  root=zfs:data/set
  root=zfs:ZFS=data/set (as a side-effect; allowed but undocumented)

  rootfstype=zfs AND root=data/set <=> root=data/set
  rootfstype=zfs AND root=         <=> root=zfs:AUTO

So rootfstype=zfs /also/ behaves as expected, and + decoding works

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Ahelenia Ziemiańska <[email protected]>
Closes #13291

0 files changed, 0 insertions, 0 deletions