Fix a few instances of M_WAITOK in threads marked as prohibited from sleep,
missed in r255824.

Approved by:	re (kib)
Sponsored by:	FreeBSD Foundation
Don't include the build date or command-line arguments in the binary.

Approved by:	re (blanket)
Regenerate the configure script before running it.
Set the default config file to /var/unbound/unbound.conf.

Approved by:	re (blanket)
Regenerate

Approved by:	re (blanket)
Replace the unused /etc/unbound directory with a symlink to /var/unbound.

Approved by:	re (blanket)