Update sample and default configs

conf/defaults.ini

@@ -335,6 +335,7 @@ tls_skip_verify_insecure = false
 tls_client_cert =
 tls_client_key =
 tls_client_ca =
+broken_auth_header_provider = false
 
 #################################### Basic Auth ##########################
 [auth.basic]

conf/sample.ini

@@ -283,6 +283,7 @@ log_queries =
 ;tls_client_cert =
 ;tls_client_key =
 ;tls_client_ca =
+;broken_auth_header_provider = false
 
 #################################### Grafana.com Auth ####################
 [auth.grafana_com]