Rewrite http-upload slots to https

Actually that's not necessary as the XEP forbids to use http://

httpupload.go

@@ -10,11 +10,11 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
 	"path/filepath"
 	"regexp"
 	"strconv"
-	"strings"
 
 	"github.com/beevik/etree"            // BSD-2-clause
 	"github.com/gabriel-vasile/mimetype" // MIT License
@@ -186,12 +186,17 @@ func httpUpload(client *xmpp.Client, iqc chan xmpp.IQ, jserver string, filePath
 	if iqHTTPUploadSlotXMLPutURL == nil {
 		log.Fatal("http-upload: no url attribute")
 	}
-	if !strings.HasPrefix(iqHTTPUploadSlotXMLPutURL.Value, "https://") {
-		log.Fatal("http-upload: upload slot does not provide https")
-	}
+	//if !strings.HasPrefix(iqHTTPUploadSlotXMLPutURL.Value, "https://") {
+	//	log.Fatal("http-upload: upload slot does not provide https")
+	//}
 	// Upload file
+	putURL, err := url.Parse(iqHTTPUploadSlotXMLPutURL.Value)
+	if err != nil {
+		log.Fatal(err)
+	}
+	putURL.Scheme = "https"
 	httpClient := &http.Client{}
-	req, err := http.NewRequest(http.MethodPut, iqHTTPUploadSlotXMLPutURL.Value,
+	req, err := http.NewRequest(http.MethodPut, putURL.String(),
 		buffer)
 	if err != nil {
 		log.Fatal(err)