Allow searching/listing bans from caUtils

[goetzk]

caUtils provides a convenient way to remove all bans (clear-bans) but no way to list or query.

It would be great to have a list-bans which outputs all bans in the DB, ideally with an option to query for a specific IP/netblock.

eg listing bans (yes, these are example addresses)

./support/bin/caUtils list-bans
192.168.48.8
192.168.8.9
127.0.0.1
...

and querying a specific block (i imagine a single address would be the same but specified in full instead of wildcard)

./support/bin/caUtils list-bans --address='10.0.4.*'
10.0.4.74
10.0.4.122
10.0.4.229
10.0.4.8

I don't know if it would be easy or not, but it would be helpful if the date+time of banning (perhaps format '%FT%T') and reason for ban were included too.