harden: key remembered site permissions by full origin (closes #402)

allowedSites and deniedSites held the bare hostname, so a grant to
https://dapp.example also authorised http://dapp.example and every port
on that host, and the connection, transaction and signature prompts
named only the hostname. Both lists now store and match the full origin
(scheme://host[:port]), the key the connections approved without
Remember already used. The prompts, the Settings site lists and
AUTISTMASK_REMOVE_SITE use the origin too. Entries saved by hostname
are not migrated (pre-1.0): they match no site.

Model: opus-5-5

tests/e2e/firefox/run.js

@@ -438,11 +438,10 @@ step(
         await d.switchToWindow(popup);
         await d.waitVisible("#view-approve-site");
 
-        const hostname = await d.text("#approve-hostname");
+        const origin = await d.text("#approve-origin");
         assert(
-            hostname === "127.0.0.1",
-            "the site prompt names the wrong origin: " +
-                JSON.stringify(hostname),
+            origin === env.server.origin,
+            "the site prompt names the wrong origin: " + JSON.stringify(origin),
         );
         const shown = await d.text("#approve-address");
         assert(
@@ -494,16 +493,16 @@ step(
 
         const screen = await d.execute(
             `return {
-             hostname: document.getElementById("approve-sign-hostname").textContent,
+             origin: document.getElementById("approve-sign-origin").textContent,
              type: document.getElementById("approve-sign-type").textContent,
              message: document.getElementById("approve-sign-message").textContent,
              from: document.getElementById("approve-sign-from").textContent,
          };`,
         );
         assert(
-            screen.hostname === "127.0.0.1",
+            screen.origin === env.server.origin,
             "the sign prompt names the wrong origin: " +
-                JSON.stringify(screen.hostname),
+                JSON.stringify(screen.origin),
         );
         assert(
             screen.type === "Personal message",
@@ -571,7 +570,7 @@ step(
 
         const screen = await d.execute(
             `return {
-             hostname: document.getElementById("approve-tx-hostname").textContent,
+             origin: document.getElementById("approve-tx-origin").textContent,
              from: document.getElementById("approve-tx-from").textContent,
              to: document.getElementById("approve-tx-to").textContent,
              value: document.getElementById("approve-tx-value").textContent,
@@ -582,9 +581,9 @@ step(
          };`,
         );
         assert(
-            screen.hostname === "127.0.0.1",
+            screen.origin === env.server.origin,
             "the transaction prompt names the wrong origin: " +
-                JSON.stringify(screen.hostname),
+                JSON.stringify(screen.origin),
         );
         assert(
             screen.from.toLowerCase().includes(env.address.toLowerCase()),