Fix applied by calculating the expireIn (max-age) seconds instead of expire datetime.
Expanded save spec by using a more complete cookie.

Use DATE_COOKIE constant instead of DateTime constant.
Expand the cookie header content with all parts.

Use datetime cookie constant.

…ice.

…in the century.

Fix php-http#67 Use 2 digit year in cookie expires date to support HHVM.

…er can not be parsed.

Add test with invalid exprires date content.
Remove obsolete sprintf statement in test.

Expand the cookie header content test with all parts.
Pass cookie parts as intended to cookie object.
Throw transfer exception when the cookie expires header can not be parsed.

Expand the cookie header content test with all parts.
Pass cookie parts as intended to cookie object.
Throw transfer exception when the cookie expires header can not be parsed.