issue #199

There were collisions between types and identifiers causing confusion
for Coccinelle (and probably other tools).

This is O(N) on both insert/search, but since the ACL lists are
several items long (usually), it is not an issue.
The lists are sorted from the longest prefix to the shortest, so
the first match is guaranteed to be longest prefix match.

refs #1486, #1675

refs #1580

@30m

Required for storing remote metadata for TSIG
key extraction.

refs #1403

 KNOT -> KNOTD
 DNSLIB -> KNOT

refs #1087 @20m

Commit refs #789.

Commit refs #789.