Ban time incr

New feature "automatically exponential increasing ban time".
WARNING: by first start the server upgrades sqlite database (table "bans" will recreated with another schema);
Option "bantime.increment" in jail.conf allows to use database for searching of previously banned ip's to increase a default ban time using special formula, by default each next ban increase banTime * 1, 2, 4, 8, 16, 32...
see "jail.conf" for some other options of "bantime.___";
additional we can configure a little randomization of ban time, to prevent "clever" botnets calculate exact time IP can be unbanned.

FailTicket can be created now without a time (current time used), with 0 as current time the ban is too old and will be ignored in branch "ban time incr". It operates with time more precise as "master", so this test case not works.
This happens because the ticket will be restored from database (getCurrentBans) and from log-file (pooling), so we should ignore all bans, that are already added from database or already obsolete.