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/transport/filter/IPFilter.java
TransportAddress[] localAddresses = boundTransportAddress.get().boundAddresses();
                profileRules.put(TransportSettings.DEFAULT_PROFILE, createRules(transportAllowFilter, transportDenyFilter, localAddresses));
                for (String profile : profiles) {
                    BoundTransportAddress profileBoundTransportAddress = profileBoundAddress.get().get(profile);
                    if (profileBoundTransportAddress == null) {
                        
                        logger.warn("skipping ip filter rules for profile [{}] since the profile is not bound to any addresses", profile);
                        continue;
                    }
                    final List<String> allowRules = this.profileAllowRules.getOrDefault(profile, Collections.emptyList());
                    final List<String> denyRules = this.profileDenyRules.getOrDefault(profile, Collections.emptyList());
                    profileRules.put(profile, createRules(allowRules, denyRules, profileBoundTransportAddress.boundAddresses()));
                }
            }
            logger.debug("loaded ip filtering profiles: {}", profileRules.keySet());
            return unmodifiableMap(profileRules);
        } else {
            return Collections.emptyMap();
        }
    }
    private SecurityIpFilterRule[] createRules(List<String> allow, List<String> deny, TransportAddress[] boundAddresses) {
        List<SecurityIpFilterRule> rules = new ArrayList<>();
        
        if (alwaysAllowBoundAddresses) {
            assert boundAddresses != null && boundAddresses.length > 0;
            rules.add(new SecurityIpFilterRule(true, boundAddresses));
        }
        
        for (String value : allow) {
            rules.add(new SecurityIpFilterRule(true, value));