Reintroduce dropped v2 dynamic config

Co-authored-by: Baptiste Mayelle <baptiste.mayelle@traefik.io>

docs/content/reference/dynamic-configuration/file.yaml

@@ -153,7 +153,8 @@ http:
           - foobar
         minResponseBodyBytes: 42
     Middleware07:
-      contentType: {}
+      contentType:
+        autoDetect: true
     Middleware08:
       digestAuth:
         users:
@@ -178,6 +179,7 @@ http:
           cert: foobar
           key: foobar
           insecureSkipVerify: true
+          caOptional: true
         trustForwardHeader: true
         authResponseHeaders:
           - foobar
@@ -243,6 +245,11 @@ http:
         referrerPolicy: foobar
         permissionsPolicy: foobar
         isDevelopment: true
+        featurePolicy: foobar
+        sslRedirect: true
+        sslTemporaryRedirect: true
+        sslHost: foobar
+        sslForceHost: true
     Middleware13:
       ipAllowList:
         sourceRange:
@@ -347,6 +354,7 @@ http:
         prefixes:
           - foobar
           - foobar
+        forceSlash: true
     Middleware25:
       stripPrefixRegex:
         regex:
@@ -464,6 +472,7 @@ tcp:
           - address: foobar
             tls: true
         serversTransport: foobar
+        terminationDelay: 42
     TCPService02:
       weighted:
         services:
@@ -584,6 +593,7 @@ tls:
       alpnProtocols:
         - foobar
         - foobar
+      preferServerCipherSuites: true
     Options1:
       minVersion: foobar
       maxVersion: foobar
@@ -602,6 +612,7 @@ tls:
       alpnProtocols:
         - foobar
         - foobar
+      preferServerCipherSuites: true
   stores:
     Store0:
       defaultCertificate: