Merge pull request #267198 from jaesoni/conn-drain-l4

Update limitation with L4 related info

Author: prmerger-automator[bot]

articles/application-gateway/tcp-tls-proxy-overview.md

@@ -38,7 +38,7 @@ Process flow:
 ## Limitations
 
 - A WAF v2 SKU gateway allows the creation of TLS or TCP listeners and backends to support HTTP and non-HTTP traffic through the same resource. However, it does not inspect traffic on TLS and TCP listeners for exploits and vulnerabilities. 
-- Advanced features like path-based routing, redirections, rewrite Headers, and URLs are only available with Layer 7 (HTTP & HTTPS) protocols.
+- The default [draining timeout](configuration-http-settings.md#connection-draining) value for backend servers is 30 seconds. At present, a user-defined draining value is not supported.
 
 ## Next steps