Append Keyboard Layout specified option for using VNC.
Part two: Append bhyve -K option for specified keyboard layout
with layout setting files every languages.
Since the cmd option '-k' was used in the meantime
it was changed to '-K'

PR: 246121
Submitted by: koinec@yahoo.co.jp
Reviewed by: grehan@
Differential Revision: https://reviews.freebsd.org/D29473

MFC after: 4 weeks