Many cookie fixes:

  o Save domains in jars like Mozilla does. It means all domains set in
    Set-Cookie: headers are dot-prefixed.
  o Save and use the 'tailmatch' field in the Mozilla/Netscape cookie jars (the
    second column).
  o Reject cookies using illegal domains in the Set-Cookie: line. Concerns
    both domains with too few dots or domains that are outside the currently
    operating server host's domain.
  o Set the path part by default to the one used in the request, if none was
    set in the Set-Cookie line.