support multiple signalhubs

[max-mapper]

would be cool if you could do signalhub([a, b, c, d]) and this handled using multiple simultaneous hubs

[max-mapper]

i now run https://signalhub.publicbits.org/

[mafintosh]

4.0.0 now supports passing in an array of hub hosts

var hub = signalhub('my-app-name', [
  'https://hub1.example.com',
  'https://hub2.example.com'
])

[ungoldman]

👍 kewl

[mafintosh]

Friends uses this now, moose-team/friends@eb87d67