It's ~25% of our logfile.
This feature was made so you can theoretically do a replay of the log, which
requires knowing which plugins were active when. But I don't think anyone's
actually doing that because it also requires other info that isn't logged.
The signatures feature has been "experimental" since Perl 5.20 (May 2014), but
expected to stay. After 8 years I'm ready to take the risk :)
Have added Perl v5.28 (June 2018) as the minimum requirement, even though the
current revbank should work with 5.20, to see if this bothers any users. Perl
v5.28 is in Debian "buster", which is now oldstable.
