Merge pull request #50818 from tengqm/fg-allowparse

Add feature gate AllowParsingUserUIDFromCertAuth

Author: k8s-ci-robot

content/en/docs/reference/command-line-tools-reference/feature-gates/AllowParsingUserUIDFromCertAuth.md

@@ -0,0 +1,16 @@
+---
+title: AllowParsingUserUIDFromCertAuth
+content_type: feature_gate
+_build:
+  list: never
+  render: false
+
+stages:
+  - stage: alpha 
+    defaultValue: false
+    fromVersion: "1.33"
+
+---
+When this feature is enabled, the subject name attribute `1.3.6.1.4.1.57683.2`
+in an X.509 certificate will be parsed as the user UID during certificate authentication.
+