don't give up on mii tick before the interface is marked up.
provide a macro to symbolically print an ioctl number.
Add hooks for RUMPRUN build of libc

If "yes", does the following (default "no"):
  * prevents ASM syscalls from being built (librump provides syscalls)
  * does not include compat (useless when application is linked with libc)
  * does not build tags (no /var/db to install them to)
  * does not include tls

==> libc for rumprun can now be built against unmodified NetBSD sources
call vsnprintf instead of snprintf; provide more detail
printable version of the scope.
remove stray breaks.
Import bind 9.10.1-P1