Limit the time between reconnections

Close #48.

Author: zcbenz

lib/service/slack/slack-account.js

@@ -47,14 +47,17 @@ class SlackAccount extends Account {
       super(service, {id: data.team_id, name: data.team})
 
     // Start real time client.
-    this.rtm = new RTMClient(config ? config.token : token)
+    const options = {
+      retryConfig: {maxRetryTime: 1000},
+      maxRequestConcurrency: 10,
+    }
+    this.rtm = new RTMClient(config ? config.token : token, options)
     require('./private-apis').extend(this.rtm)
     this.rtm.once('unable_to_rtm_start', this.reportError.bind(this))
     this.rtm.once('authenticated', this.ready.bind(this))
     this.rtm.start({batch_presence_aware: true})
 
     // Indicate whether this is reconnection.
-    // the ready method has been called.
     this.isReconnect = false
 
     this.rtm.on('error', this.reportError.bind(this))