Update configuration.asciidoc (#724)

Author: gregkalapos

docs/configuration.asciidoc

@@ -728,6 +728,7 @@ Valid options: `Critical`, `Error`, `Warning`, `Info`, `Debug`, `Trace` and `Non
 | <<config-capture-body-content-types,`CaptureBodyContentTypes`>> | Yes | HTTP, Performance
 | <<config-capture-headers,`CaptureHeaders`>> | No | HTTP, Performance
 | <<config-central-config,`CentralConfig`>> | No | Core
+| <<config-disable-metrics,`DisableMetrics`>> | No | Reporter
 | <<config-environment,`Environment`>> | No | Core
 | <<config-flush-interval,`FlushInterval`>> | No | Reporter
 | <<config-global-labels,`GlobalLabels`>> | No | Core
@@ -745,6 +746,9 @@ Valid options: `Critical`, `Error`, `Warning`, `Info`, `Debug`, `Trace` and `Non
 | <<config-stack-trace-limit,`StackTraceLimit`>> | No | Stacktrace, Performance
 | <<config-transaction-max-spans,`TransactionMaxSpans`>>  | Yes | Core, Performance
 | <<config-transaction-sample-rate,`TransactionSampleRate`>> | Yes | Core, Performance
+| <<config-use-elastic-apm-traceparent-header,`UseElasticTraceparentHeader`>> | No | HTTP
+| <<config-verify-server-cert,`VerifyServerCert`>> | No | Reporter
+
 |============
 
 NOTE: Reloadable means that the setting can be changed after agent's start.