Cookies for host specified by IP address

From 3.79 version cookie extraction wasn't working for host specified by IP address.
According to RFC 6265 domain string match given string if strings are identical:

```
5.1.3.  Domain Matching

   A string domain-matches a given domain string if at least one of the
   following conditions hold:

   o  The domain string and the string are identical.  (Note that both
      the domain string and the string will have been canonicalized to
      lower case at this point.)

   o  All of the following conditions hold:

      *  The domain string is a suffix of the string.

      *  The last character of the string that is not included in the
         domain string is a %x2E (".") character.

      *  The string is a host name (i.e., not an IP address).
```