4.7 Cookie - HTTP State Management
The Cookie module provides convenient ways for creating,
parsing, sending and receiving HTTP Cookies, as defined in the
specification published by Netscape.
Note:
Even though there are official IETF RFC's describing HTTP State
  Management Mechanism using cookies, the de facto standard supported
  by most browsers is the original Netscape specification.
  Furthermore, true compliance with IETF standards is actually
  incompatible with many popular browsers, even those that claim to be
  RFC-compliant.  Therefore, this module supports the current common
  practice, and is not fully RFC compliant.
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