Bring back v2 rule matchers

docs/content/reference/static-configuration/cli-ref.md

@@ -105,6 +105,9 @@ Activate TLS-ALPN-01 Challenge. (Default: ```true```)
 `--certificatesresolvers.<name>.tailscale`:  
 Enables Tailscale certificate resolution. (Default: ```true```)
 
+`--core.defaultrulesyntax`:  
+Defines the rule parser default syntax (v2 or v3) (Default: ```v3```)
+
 `--entrypoints.<name>`:  
 Entry points definition. (Default: ```false```)
 

docs/content/reference/static-configuration/env-ref.md

@@ -105,6 +105,9 @@ Activate TLS-ALPN-01 Challenge. (Default: ```true```)
 `TRAEFIK_CERTIFICATESRESOLVERS_<NAME>_TAILSCALE`:  
 Enables Tailscale certificate resolution. (Default: ```true```)
 
+`TRAEFIK_CORE_DEFAULTRULESYNTAX`:  
+Defines the rule parser default syntax (v2 or v3) (Default: ```v3```)
+
 `TRAEFIK_ENTRYPOINTS_<NAME>`:  
 Entry points definition. (Default: ```false```)
 

docs/content/reference/static-configuration/file.toml

@@ -453,5 +453,8 @@
     [experimental.localPlugins.LocalDescriptor1]
       moduleName = "foobar"
 
+[core]
+  defaultRuleSyntax = "foobar"
+
 [spiffe]
   workloadAPIAddr = "foobar"

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

@@ -486,5 +486,7 @@ experimental:
     LocalDescriptor1:
       moduleName: foobar
   kubernetesGateway: true
+core:
+  defaultRuleSyntax: foobar
 spiffe:
   workloadAPIAddr: foobar