use posix-safe typename.  s/u_int/unsigned int/.  from netbsd-current.
use posix-safe typename.  s/u_int/unsigned int/.  from netbsd-current.

MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame,MarginC/kame