protocol: make RedirectChannel compatible with PM 28.5

The sketchy meta-redirect previously used was no longer working with
Palemoon 28.5. This is an even more sketchy version that uses a
JavaScript redirect, but seems to work.

This redirect screws up the history, so this introduces a new bug as
well :/

My XPCOM-fu isn't quite good enough to figure out a nice way to
redirect a channel without this crap, so open to suggestions on a more
elegant way to solve this.

BUG=madand#9
TEST=visited dactyl://help-tag/starting and got to the correct page

Signed-off-by: Jack Rosenthal <jack@rosenth.al>

common/modules/protocol.jsm

@@ -56,10 +56,15 @@ function NetError(orig, error) {
 function RedirectChannel(to, orig, time, message) {
     let html = DOM.toXML(
         ["html", {},
-            ["head", {},
-                ["meta", { "http-equiv": "Refresh", content: (time || 0) + ";" + to }]],
-            ["body", {},
-                ["h2", { style: "text-align: center" }, message || ""]]]);
+         ["head", {},
+          ["script", {},
+           "setTimeout(function () { window.location = '"
+           + to
+           + "'; }, "
+           + ((time || 0) * 1000)
+           + ");"]],
+         ["body", {},
+          ["h2", { style: "text-align: center" }, message || ""]]]);
     return StringChannel(html, "text/html", services.io.newURI(to, null, null));
 }