[conformal/btcd] 1d60e5: Fixed data races in rpcwebsocket Notify functions

[Francis Lam]

  Branch: refs/heads/master
  Home:   https://github.com/conformal/btcd
  Commit: 1d60e5dba5dfe990c12a78c56d95ae5970d76466
      
https://github.com/conformal/btcd/commit/1d60e5dba5dfe990c12a78c56d95ae5970d76466
  Author: Francis Lam <f...@alum.mit.edu>
  Date:   2014-02-10 (Mon, 10 Feb 2014)

  Changed paths:
    M rpcwebsocket.go

  Log Message:
  -----------
  Fixed data races in rpcwebsocket Notify functions

Access to connections map and associated notification maps in rpcServer
need to be protected with s.ws.Lock to prevent race with add/remove new
clients.

This closes #88.