docs: Stricter shortcut link redirections

Avoids some recursion and 404 endpoint issues. Serves as good
examples for future additions.

The "Intermittent federation failures to a specific server"
section is now ID'd as #intermittent for easier reachability.

docs/troubleshooting.mdx

@@ -64,7 +64,7 @@ ### DNS server overload
 
 Follow the [**DNS tuning guide**](./guides/dns) for details on setting it up.
 
-### Intermittent federation failures to a specific server
+### Intermittent federation failures to a specific server {#intermittent}
 
 There may be circumstances where servers fail to connect to each other, probably due to a bad DNS cache. In such cases, issuing `!admin debug ping <SERVER_NAME>` would return some errors, and `!admin query resolver cache <SERVER_NAME>` would return a wrong destination endpoint.
 

rspress.config.ts

@@ -65,16 +65,13 @@ export default defineConfig({
     }),
     pluginClientRedirects({
         redirects: [{
-            from: '/configuration/examples',
+            from: '^/config_reference$',
             to: '/reference/config'
         }, {
-            from: '/admin_reference',
+            from: '^/admin_reference$',
             to: '/reference/admin'
         }, {
-            from: '/server_reference',
-            to: '/reference/server'
-        }, {
-            from: '/community$',
+            from: '^/community$',
             to: '/community/guidelines'
         }, {
             from: "^/turn$",
@@ -83,7 +80,7 @@ export default defineConfig({
             from: "^/livekit$",
             to: "/calls/livekit",
         }, {
-            from: "^/dns",
+            from: "^/dns$",
             to: "/guides/dns",
         }, {
             from: "^/source(|_code)$",