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
AuditEventMetaInfo(
            Optional<User> user,
            Optional<String> realm,
            Optional<AuthorizationInfo> authorizationInfo,
            Optional<String[]> indices,
            Optional<String> action
        ) {
            this.principal = user.map(u -> u.principal()).orElse("");
            this.realm = realm.orElse("");
            this.action = action.orElse("");
            
            
            
            
            
            this.roles = () -> authorizationInfo.filter(info -> {
                final Object value = info.asMap().get("user.roles");
                return value instanceof String[]
                    && ((String[]) value).length != 0
                    && Arrays.stream((String[]) value).anyMatch(Objects::nonNull);
            }).map(info -> Arrays.stream((String[]) info.asMap().get("user.roles"))).orElse(Stream.of(""));
            this.indices = () -> indices.filter(i -> i.length > 0)
                .filter(a -> Arrays.stream(a).anyMatch(Objects::nonNull))
                .map(Arrays::stream)
                .orElse(Stream.of(""));
        }
        AuditEventMetaInfo(
            Optional<AuthenticationToken> authenticationToken,
            Optional<String> realm,
            Optional<String[]> indices,