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
}
            logEntry.with(REQUEST_METHOD_FIELD_NAME, request.method().toString());
            return this;
        }
        LogEntryBuilder withRunAsSubject(Authentication authentication) {
            logEntry.with(PRINCIPAL_FIELD_NAME, authentication.getAuthenticatingSubject().getUser().principal())
                .with(PRINCIPAL_REALM_FIELD_NAME, authentication.getAuthenticatedBy().getName())
                .with(PRINCIPAL_RUN_AS_FIELD_NAME, authentication.getUser().principal());
            if (authentication.getLookedUpBy() != null) {
                logEntry.with(PRINCIPAL_RUN_AS_REALM_FIELD_NAME, authentication.getLookedUpBy().getName());
            }
            return this;
        }
        LogEntryBuilder withRestOrigin(RestRequest request) {
            assert LOCAL_ORIGIN_FIELD_VALUE.equals(logEntry.get(ORIGIN_TYPE_FIELD_NAME)); 
            final InetSocketAddress socketAddress = request.getHttpChannel().getRemoteAddress();
            if (socketAddress != null) {
                logEntry.with(ORIGIN_TYPE_FIELD_NAME, REST_ORIGIN_FIELD_VALUE)
                    .with(ORIGIN_ADDRESS_FIELD_NAME, NetworkAddress.format(socketAddress));
            }
            
            return this;
        }
        LogEntryBuilder withRestOrTransportOrigin(TransportRequest transportRequest, ThreadContext threadContext) {
            assert LOCAL_ORIGIN_FIELD_VALUE.equals(logEntry.get(ORIGIN_TYPE_FIELD_NAME)); 
            final InetSocketAddress restAddress = RemoteHostHeader.restRemoteAddress(threadContext);
            if (restAddress != null) {
                logEntry.with(ORIGIN_TYPE_FIELD_NAME, REST_ORIGIN_FIELD_VALUE)
                    .with(ORIGIN_ADDRESS_FIELD_NAME, NetworkAddress.format(restAddress));
            } else {