Choose secure single-user mode by default

Choose secure single-user mode by default

Without this entry init.bsdi don't ask root password when it goes
to sigle-user. This entry must present here in any case,
subject of arguing can be only default mode, I mean
"secure" or "insecure" here. Please consider this entry
like template and change "insecure" to "secure" if you
are _shure_, but not back out whole line.

# This entry needed for asking password when init goes to single-user mode
console	none				unknown	off insecure