Do not print private keys to logs. It has no debugging value and it...

Do not print private keys to logs. It has no debugging value and it compromises security when users share their logs. We need the public keys anwyay to compare across logs.

e2e/ratchet/ratchet.go

@@ -104,10 +104,11 @@ func (r *Ratchet) AddPartner(partnerID *id.ID,
 
 	myID := r.myID
 
-	jww.INFO.Printf("Adding Partner %s:\n\tMy Private Key: %s"+
+	myPubKey := diffieHellman.GeneratePublicKey(myPrivKey, r.grp)
+	jww.INFO.Printf("Adding Partner %s:\n\tMy Public Key: %s"+
 		"\n\tPartner Public Key: %s to %s",
 		partnerID,
-		myPrivKey.TextVerbose(16, 0),
+		myPubKey.TextVerbose(16, 0),
 		partnerPubKey.TextVerbose(16, 0), myID)
 
 	mid := *partnerID