Enable starting a Node without using the bootstrap peers nor mdns (for controlled tests) about js-ipfsd-ctl

[daviddias]

important to note:

15:40 <+daviddias> whyrusleeping: does go-ipfs have a command to start a daemon and avoid using mdns and bootstrap nodes or is that all env vars?
15:42 <@whyrusleeping> daviddias: uhm....
15:42 <@whyrusleeping> we were going to have a setting so you could pass arbitrary config values to init
15:42 <@whyrusleeping> but i dont know if that ever happened
15:43 <@whyrusleeping> you'll have to run init, make the changes, and then run the daemon

'{"Mdns":false,"Bootstrap":null}'

needs --json option

$ ipfs config Mdns false --json
$ ipfs config Bootstrap null --json

[daviddias]

done on #25

[jbenet]

maybe would be good to add --discovery none and --routing none options

[jbenet]

cc @whyrusleeping