* Utilize last scan message ID to scan areas
* Lots of changes to FTN packet creation
* Create packets with target max size
* Create ArcMail bundles when configured to do so
* Code cleanup
* Fix FTN packet header writing
* Add CHRS support to FTN packet I/O
* Change to FNV-1a hash of ms since 2016-1-1 ("enigma epoc") + message ID for MSGID serial number and <packet>.pkt BSO export
* Only write some FTN kludges for EchoMail (vs NetMail)
* If config specifies, call message network modoule(s) .record() method @ persist (WIP)
* Minor updates to ES6 in some areas
* Better bbs.js startup seq
* Better iterator support for loadModulesForCategory()
* Start work on loading message network modules & tieing in record() (WIP)
* FTN PacketHeader is now a ES6 class
* Various FTN utils, e.g. Via line creation