Support link.unannounce

[mafintosh]

Companion PR for bitfinexcom/grenache-grape#45 that adds support for explicit unannounce to the link client.

[mafintosh]

@robertkowalski is there a standard module/method to continously announce a service using a link or are you writing an announce interval loop everytime basically?

[robertkowalski]

yes, i can help you to integrate that. we just opened sourced our service framework. it is build on the grenache core libraries: https://medium.com/bitfinex/introducing-svc-js-a-framework-for-grenache-7119f2d7769e

the announce code is here, together with the callback thats called on service shutdown: https://github.com/bitfinexcom/bfx-facs-grc/blob/c65b101d82eb1c1a3d067df4bcbe3f40d51e5d44/index.js#L122-L141

when we have landed the dht extension i can submit a pr that adds it to svc-js

ps: great work looks really cool!