Question about ssl_asynch on

Hi there,

When I was trying QAT SW (with async_mode_nginx v0.5.0), I found out that if I switched on `ssl_asynch`, it automatically switched `ssl` on. Is there any specific reason for this?
I also noticed that you removed this part of codes in v0.5.2:

```
/* If ssl_asynch on is configured, then ssl on is configured by default
* This will align 'ssl_asynch on;' and 'listen port ssl' diretives
* */
pssl = (ngx_flag_t *) ((char *)conf + offsetof(ngx_http_ssl_srv_conf_t, enable));
pssl_asynch = (ngx_flag_t *) ((char *)conf + cmd->offset);

if(*pssl_asynch && *pssl != 1) {
*pssl = *pssl_asynch;
}
```

Does this mean that I can now use my v0.5.0 and remove this logic without any other side effects?

Thank you very much.