Some types of audit event samples from [our documentation](https://www.elastic.co/guide/en/elasticsearch/reference/7.17/audit-event-types.html) include the port number in "origin.address", like **access_denied**:
```json
{"type":"audit", "timestamp":"2020-12-30T22:30:06,949+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"transport", "event.action":
"access_denied", "authentication.type":"REALM", "user.name":"user1",
"user.realm":"default_native", "user.roles":["test_role"], "origin.type":
"rest", "origin.address":"[::1]:52434", "request.id":"yKOgWn2CRQCKYgZRz3phJw",
"action":"indices:admin/auto_create", "request.name":"CreateIndexRequest",
"indices":["<index-{now/d+1d}>"]}
```
but other types like **connection_denied** from this issue does not include the port:

```json
{"type":"audit", "timestamp":"2020-12-30T21:47:31,526+0200", "node.id":
"0RMNyghkQYCc_gVd1G6tZQ", "event.type":"ip_filter", "event.action":
"connection_denied", "origin.type":"rest", "origin.address":"10.10.0.20",
"transport.profile":".http", "rule":"deny 10.10.0.0/16"}
```

I think we should be consistent here and always include the port number in the "origin.address" field.
x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/audit/logfile/LoggingAuditTrail.java
if (events.contains(SECURITY_CONFIG_CHANGE) && SECURITY_CHANGE_ACTIONS.contains(action)) {
            try {
                if (msg instanceof PutUserRequest) {
                    assert PutUserAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((PutUserRequest) msg).build();
                } else if (msg instanceof PutRoleRequest) {
                    assert PutRoleAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((PutRoleRequest) msg).build();
                } else if (msg instanceof PutRoleMappingRequest) {
                    assert PutRoleMappingAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((PutRoleMappingRequest) msg).build();
                } else if (msg instanceof SetEnabledRequest) {
                    assert SetEnabledAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((SetEnabledRequest) msg).build();
                } else if (msg instanceof ChangePasswordRequest) {
                    assert ChangePasswordAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((ChangePasswordRequest) msg).build();
                } else if (msg instanceof CreateApiKeyRequest) {
                    assert CreateApiKeyAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((CreateApiKeyRequest) msg).build();
                } else if (msg instanceof GrantApiKeyRequest) {
                    assert GrantApiKeyAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((GrantApiKeyRequest) msg).build();
                } else if (msg instanceof PutPrivilegesRequest) {
                    assert PutPrivilegesAction.NAME.equals(action);
                    securityChangeLogEntryBuilder(requestId).withRequestBody((PutPrivilegesRequest) msg).build();