libzfs: Make zfs_cmd_t initialization consistent, use zfs_ioctl

The clang version 8.0.1 shipped in FreeBSD 12.1-RELEASE also oddly
throws a warning that is treated as an error on the initialization of
the zc struct in zpool_nextboot.

The zpool_nextboot code from FreeBSD was not updated to use zfs_ioctl.

Switch ioctl to zfs_ioctl in and use {"\0"} to initialize the struct.
Do a consistency pass for zfs_cmd_t initialization.

Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: George Wilson <[email protected]>
Signed-off-by: Ryan Moeller <[email protected]>
Closes #10539 

0 files changed, 0 insertions, 0 deletions