Find sealed connector standard

[LorenzMeier]

@proficnc This is to track our discussion about sealed connectors for Dronecode. Feel free to throw in any intermediate results.

[ChukRhodes]

I've used Micro-Con-X with good results in most weather. They probably wouldn't do well under water. Easy enough to solder/assemble by hand. And a decent range of panel and cable ends, male and female sockets, solder cup and PCB pins. Not the smallest thing available, but are end-user friendly (for custom cables).