mfiutil Code

Make mfi_next_learn_time function to take a 'FILE *' argument for output

mfiutil: Change mfi_autolearn_(period|mode) to write to a FILE

This avoids using fragile logic with snprintf() to build strings.

For the calling code in mfi_show.c, I chose to pass stdout directly
instead of using fmemopen() to write to the temporary buffer since
that is simpler and avoids having to deal with output truncation.

Differential Revision: https://reviews.freebsd.org/D50881

Import from FreeBSD base commit fe1cd73, with changes

Always use the provided 'scsi_inquiry.h' file for all platforms

When changing boot drive or volume, make sure the specified drive or volume actually exists, before continuing

Reject invalid volume target ID from function 'mfi_lookup_volume'

Add 'boot' subcommand

Add 'show boot' subcommand

Recognize and report newer SPC versions for drives, up to SPC-7

Fix incorrect reporting of SPC-3 drives as 'SAS'; properly report conforming SCSI version of drives, up to SPC-2

Remove unnecessary GPL version 2 licensing option from scsi_inquiry.h since the modified BSD license is already compatible with the GNU GPL