Improve Redirector extension instructions

This specifies advanced options for configuring the Redirector
extension. If everything is let on (like images) things will break
(like images). It also improves the regular expression a bit to account
for the image CDN

Co-authored-by: Austin Huang <im@austinhuang.me>

src/pages/faq/index_page.cr

@@ -34,19 +34,45 @@ class Faq::IndexPage < MainLayout
         end
         li do
           strong "Include pattern: "
-          code "^https?://(?:.*\\.)*(?<!link\\.)medium\\.com(/.*)?$"
+          code "^https?://(?:.*\\.)*(?<!(link\\.|cdn\\-images\\-\\d+\\.))medium\\.com(/.*)?$"
         end
         li do
           strong "Redirect to: "
           code "https://"
           code app_domain
-          code "$1"
+          code "/$2"
         end
         li do
           strong "Pattern type: "
           code "( ) Wildcard   (•) Regular Expression"
         end
       end
+      h3 "Advanced options"
+      ul do
+        li do
+          strong "Exclude pattern: "
+          text "(leave blank)"
+        end
+        li do
+          strong "Process matches: "
+          code "No Processing"
+        end
+        li do
+          strong "Apply to: "
+          ul do
+            li { code "[x] Main window (address bar)" }
+            li { code "[x] IFrames" }
+            li { code "[ ] Stylesheets" }
+            li { code "[ ] Scripts" }
+            li { code "[ ] Images" }
+            li { code "[ ] Responsive images" }
+            li { code "[ ] Objects" }
+            li { code "[x] XMLHttpRequests" }
+            li { code "[x] History State" }
+            li { code "[x] Other" }
+          end
+        end
+      end
       para "Visiting any medium.com site (including user.medium.com subdomains) should now redirect to Scribe instead!"
     end
   end