MM-22273 New auditing system (phase 1) (#13967)

* New auditing API outputting to syslog via TLS

* New config section for specifying remote syslog server IP, port, and cert.

* Legacy audit API retained for access history feature

api4/elasticsearch.go

@@ -6,6 +6,7 @@ package api4
 import (
 	"net/http"
 
+	"github.com/mattermost/mattermost-server/v5/audit"
 	"github.com/mattermost/mattermost-server/v5/model"
 )
 
@@ -39,6 +40,9 @@ func testElasticsearch(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func purgeElasticsearchIndexes(c *Context, w http.ResponseWriter, r *http.Request) {
+	auditRec := c.MakeAuditRecord("purgeElasticsearchIndexes", audit.Fail)
+	defer c.LogAuditRec(auditRec)
+
 	if !c.App.SessionHasPermissionTo(*c.App.Session(), model.PERMISSION_MANAGE_SYSTEM) {
 		c.SetPermissionError(model.PERMISSION_MANAGE_SYSTEM)
 		return
@@ -54,5 +58,7 @@ func purgeElasticsearchIndexes(c *Context, w http.ResponseWriter, r *http.Reques
 		return
 	}
 
+	auditRec.Success()
+
 	ReturnStatusOK(w)
 }