both unbound and ldns needed some bitriggin in configure
enable unbound_control. While here a cosmetic change in the explanation of
'username'
Install unbound.conf
add unbound to mtree
add a startup script for unbound to rc.d
add unbound to rc as an early daemon. Generate keys if needed
add unbound_flags to rc.conf
Add _unbound user and group. Add valid alias to mail/aliases
syslog should make a log socket in unbound chroot