Fix listing of stuff in CLI

Fix logic to avoid print "No matching ... found" when number of result
fall on limit. Ie, 50 prefixes would pring "No matching prefixes found"
as the limit is set to 50.

Fixes #461.
Add column headers to address list

This adds column headers as well as a message showing which VRF we are
searching in.

Fixes #463.
Merge branch '461-listing-fix'