Use freehaven.net domains for bridge and broker

A quick, temporary fix to get around Google safe browsing blockage of
bamsoftware.com

proxy/config.js

 
 class Config {}
 
-Config.prototype.brokerUrl = 'snowflake-broker.bamsoftware.com';
+Config.prototype.brokerUrl = 'snowflake-broker.freehaven.net';
 
 Config.prototype.relayAddr = {
-  host: 'snowflake.bamsoftware.com',
+  host: 'snowflake.freehaven.net',
   port: '443'
 };