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
Property.NodeScope,
        Property.Dynamic
    );
    public static final Setting<Boolean> EMIT_CLUSTER_UUID_SETTING = Setting.boolSetting(
        setting("audit.logfile.emit_cluster_uuid"),
        true,
        Property.NodeScope,
        Property.Dynamic
    );
    private static final List<String> DEFAULT_EVENT_INCLUDES = Arrays.asList(
        ACCESS_DENIED.toString(),
        ACCESS_GRANTED.toString(),
        ANONYMOUS_ACCESS_DENIED.toString(),
        AUTHENTICATION_FAILED.toString(),
        CONNECTION_DENIED.toString(),
        TAMPERED_REQUEST.toString(),
        RUN_AS_DENIED.toString(),
        RUN_AS_GRANTED.toString(),
        SECURITY_CONFIG_CHANGE.toString()
    );
    public static final Setting<List<String>> INCLUDE_EVENT_SETTINGS = Setting.listSetting(
        setting("audit.logfile.events.include"),
        DEFAULT_EVENT_INCLUDES,
        Function.identity(),
        value -> AuditLevel.parse(value, List.of()),
        Property.NodeScope,
        Property.Dynamic
    );
    public static final Setting<List<String>> EXCLUDE_EVENT_SETTINGS = Setting.listSetting(
        setting("audit.logfile.events.exclude"),