* Improve netdisco-sshcollector CLI experience
* add -d <device>
* add -O debug option to toggle Net::OpenSSH::debug
* add -w MCE::Loop max_workers
* updated POD for all of the above
* Fix -Q documentation
* Specifying -Q multiple times has no effect, removed part talking about that.
* Emit Net::OpenSSH connection failures as warnings
Some devices can contain random non-utf8 data in syscontact and syslocation,
making the insert fail with "ERROR: invalid byte sequence for encoding "UTF8"
on discovery. Work around this with Encode::decode.