[golangci-lint]: Use constant for result.

const.go

@@ -23,4 +23,5 @@ const (
 	strChat          = "chat"
 	strError         = "error"
 	strGroupchat     = "groupchat"
+	strResult        = "result"
 )

httpupload.go

@@ -85,7 +85,7 @@ func httpUpload(client *xmpp.Client, iqc chan xmpp.IQ,
 		if err != nil {
 			log.Fatal(err)
 		}
-		if iqDiscoInfo.Type != "result" {
+		if iqDiscoInfo.Type != strResult {
 			continue
 		}
 		iqDiscoInfoXML := etree.NewDocument()
@@ -170,7 +170,7 @@ func httpUpload(client *xmpp.Client, iqc chan xmpp.IQ,
 	if err != nil {
 		log.Fatal(err)
 	}
-	if uploadSlot.Type != "result" {
+	if uploadSlot.Type != strResult {
 		log.Fatal("error while requesting upload slot.")
 	}
 	iqHTTPUploadSlotXML := etree.NewDocument()

ox.go

@@ -265,7 +265,7 @@ func oxPublishPubKey(jid string, client *xmpp.Client, iqc chan xmpp.IQ,
 	if err != nil {
 		return err
 	}
-	if iqReply.Type != "result" {
+	if iqReply.Type != strResult {
 		return errors.New("error while publishing public key")
 	}
 	ownPubKeyRingFromPubsub, err := oxRecvPublicKeys(client, iqc, jid, fingerprint)
@@ -313,7 +313,7 @@ func oxPublishPubKey(jid string, client *xmpp.Client, iqc chan xmpp.IQ,
 	if err != nil {
 		return err
 	}
-	if iqReply.Type != "result" {
+	if iqReply.Type != strResult {
 		return errors.New("couldn't publish public key list")
 	}
 	return nil
@@ -499,7 +499,7 @@ func oxRecvPublicKeys(client *xmpp.Client, iqc chan xmpp.IQ, recipient string,
 	if err != nil {
 		return nil, err
 	}
-	if oxPublicKey.Type != "result" {
+	if oxPublicKey.Type != strResult {
 		return nil, errors.New("error while requesting public key for " +
 			recipient)
 	}
@@ -574,7 +574,7 @@ func oxGetPublicKeyRing(client *xmpp.Client, iqc chan xmpp.IQ,
 	if err != nil {
 		log.Fatal(err)
 	}
-	if oxPublicKeyList.Type != "result" {
+	if oxPublicKeyList.Type != strResult {
 		return nil, errors.New("error while requesting public openpgp keys for " +
 			recipient)
 	}