Address parsers status

[RossSmyth]

• USB
• TCPIP
• Serial

I consider optional:

• GPIB
• VXI
• GPIB-VXI
• PXI

[RossSmyth]

I am currently rolling my own parsers cause it's easy. But the two addresses that I want, USB and TCPIP have the easiest (USB) and hardest (TCPIP) grammars to implement. After doing TCPIP I'll do a post-mortemand see if switching to a parser library (aka Chumsky) would be worth it for maintenance. Though of course ideally the parsers would be perfect first try.