fix: added missing ini default keys, fixes #12800 (#12912)

conf/defaults.ini

@@ -315,6 +315,9 @@ api_url =
 team_ids =
 allowed_organizations =
 tls_skip_verify_insecure = false
+tls_client_cert =
+tls_client_key =
+tls_client_ca =
 
 #################################### Basic Auth ##########################
 [auth.basic]

conf/sample.ini

@@ -272,6 +272,10 @@ log_queries =
 ;api_url = https://foo.bar/user
 ;team_ids =
 ;allowed_organizations =
+;tls_skip_verify_insecure = false
+;tls_client_cert =
+;tls_client_key =
+;tls_client_ca =
 
 #################################### Grafana.com Auth ####################
 [auth.grafana_com]