VSCode DDoS itself discovering ports for the tunnel feature (#231668)

* VSCode DDoS itself discovering ports for the tunnel feature
Fixes #230738

* Expand limit

src/vs/workbench/api/node/extHostTunnelService.ts

@@ -105,6 +105,9 @@ export function loadConnectionTable(stdout: string): Record<string, string>[] {
 }
 
 function knownExcludeCmdline(command: string): boolean {
+	if (command.length > 500) {
+		return false;
+	}
 	return !!command.match(/.*\.vscode-server-[a-zA-Z]+\/bin.*/)
 		|| (command.indexOf('out/server-main.js') !== -1)
 		|| (command.indexOf('_productName=VSCode') !== -1);