Ability to specify seednodes and network key via the daemon

[KewbitXMR]

Allows you to specify seednodes via the mobile/desktop app essentially allowing the user to connect to one or any distinct Haveno networks/markets without necessitating separate installers.

Currently seednodes are hardcoded into the software and forkers have to change it manually, it should be dynamic and up to the user which nodes to trust.

This will make using different networks easier, and also allow for federation of some kind in the apps, which I view as an anti-monopoly strategy, which is essential for true decentralisation.

[boldsuck]

You can specify individual seednodes via cmdline --seedNodes= or in ~/.local/share/Haveno/haveno.properties

For testing purposes I have e.g. ~/.local/share/Haveno-reto/haveno.properties

seedNodes=xephvvzd3orepnny7lbia4nkwie5t7wjivlvvz5lhbsck7ubavystead.onion:9992,z47tltuwytd5icqq4hni2ammvlugp6pcwqboeu7ngawruualxjjuu3ad.onion:9992,hxb5h34hjgyraycrrxlz5ar2q77mjgondzicwzayqwwvuaepssrn5zyd.onion:9993,g4z6oi2wf62nwztwve6qe2hqswj4ezpom6hn7cuy5cxaidey4us76bid.onion:9993,oyui76zng5nhml6xlrysfmyqgoutlhwr3h7p35rlzr5fvtg6tzgavvqd.onion:9992