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
Optional.empty(),
                        Optional.empty()
                    )
                ) == false) {
            new LogEntryBuilder().with(EVENT_TYPE_FIELD_NAME, REST_ORIGIN_FIELD_VALUE)
                .with(EVENT_ACTION_FIELD_NAME, "run_as_denied")
                .with(authorizationInfo.asMap())
                .withRestUriAndMethod(request)
                .withRunAsSubject(authentication)
                .withRestOrigin(request)
                .withRequestBody(request)
                .withRequestId(requestId)
                .withThreadContext(threadContext)
                .build();
        }
    }
    @Override
    public void coordinatingActionResponse(
        String requestId,
        Authentication authentication,
        String action,
        TransportRequest transportRequest,
        TransportResponse transportResponse
    ) {
        
    }
    private LogEntryBuilder securityChangeLogEntryBuilder(String requestId) {
        return new LogEntryBuilder(false).with(EVENT_TYPE_FIELD_NAME, SECURITY_CHANGE_ORIGIN_FIELD_VALUE).withRequestId(requestId);
    }
    private class LogEntryBuilder {