stpkg: fix dl links for the mxc => https conversion

stpkg

@@ -226,9 +226,11 @@ create_sticker_json() {
 mxc_to_https() {
     # The transformation is the following
     # `mxc://<serv>/<id>` => `https://<serv>/_matrix/media/r0/download/<serv>/<id>`
+    # It seems that every requests should be made to matrix.org...
+    # `mxc://<serv>/<id>` => `https://matrix.org/_matrix/media/r0/download/<serv>/<id>`
     local SERV=`echo "$1" | awk -F/ '{print $3}'`
     local ID=`echo "$1" | awk -F/ '{print $4}'`
-    echo "https://$SERV/_matrix/media/r0/download/$SERV/$ID"
+    echo "https://matrix.org/_matrix/media/r0/download/$SERV/$ID"
 }
 
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