appeased the mighty setlist gods by telling them what they should know
Use correct linebytes.
kern/49391: Fixes to XHCI driver command ring and status TRB

CRCR needs 64byte aligned address

Use usb_allocmem instead of usb_allocmem_flags(..., 0)

Correct status stage TRB in xhci_device_ctrl_start - direction logic was
wrong.

Correct a typo in a comment
Mention about -E and -c options in the BUGS section.