Merge branch v3.1 into v3.2

docs/content/middlewares/http/basicauth.md

@@ -341,3 +341,4 @@ http:
   [http.middlewares.test-auth.basicAuth]
     removeHeader = true
 ```
+{!traefik-for-business-applications.md!}

docs/content/middlewares/http/forwardauth.md

@@ -611,4 +611,6 @@ http:
 [http.middlewares.test-auth.forwardAuth]
   # ...
   headerField = "X-WebAuth-User"
-```
+```
+
+{!traefik-for-business-applications.md!}

docs/content/middlewares/http/redirectregex.md

@@ -84,3 +84,5 @@ The `replacement` option defines how to modify the URL to have the new target UR
 !!! warning
 
     Care should be taken when defining replacement expand variables: `$1x` is equivalent to `${1x}`, not `${1}x` (see [Regexp.Expand](https://golang.org/pkg/regexp/#Regexp.Expand)), so use `${1}` syntax.
+
+{!traefik-for-business-applications.md!}

docs/content/middlewares/http/stripprefix.md

@@ -145,3 +145,5 @@ http:
     prefixes = ["/foobar"]
     forceSlash = false
 ```
+
+{!traefik-for-business-applications.md!}