Feat/freeswitch logging (#1309)

* include callSid on INVITEs to freeeswitch

* remove unnecessary warning

lib/session/call-session.js

@@ -2378,6 +2378,7 @@ Duration=${duration} `
       const ep = await this._createMediaEndpoint({
         headers: {
           'X-Jambones-Call-ID': this.callId,
+          'X-Call-Sid': this.callSid,
         },
         remoteSdp: this.req.body
       });