tree bc1a8336d9dc557f54799df687e046889c0d87bc
parent e8a24da510c62c0657d2df43ebbde25bffbc1a41
author Darrick J. Wong <darrick.wong@oracle.com> 1603411398 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1605547804 -0800

mkfs: allow overridable option values

If an option value ends with the string '?', treat it as a value that
can be respecified later.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>