jetty-12 ee9 Double parsing of cookies

[janbartel]

Relevant tck tests:

com/sun/ts/tests/servlet/api/jakarta_servlet_http/cookie/URLClient.java.getPathTest
com/sun/ts/tests/servlet/api/jakarta_servlet_http/cookie/URLClient.java.getDomainTest
com/sun/ts/tests/servlet/api/jakarta_servlet_http/cookie/URLClient.java.getVersionTest
com/sun/ts/tests/servlet/pluggability/api/jakarta_servlet_http/cookie/URLClient.java.getDomainTest
com/sun/ts/tests/servlet/pluggability/api/jakarta_servlet_http/cookie/URLClient.java.getPathTest
com/sun/ts/tests/servlet/pluggability/api/jakarta_servlet_http/cookie/URLClient.java.getVersionTest

When a request enters jetty, the SessionHandler needs to see the list of cookies and calls org.eclipse.jetty.server.Request.getCookies() which parses them. Later on, application code calls org.eclipse.jetty.ee9.nested.Request.getCookies() to retrieve the list of cookies. Unfortunately the nested Request maintains a completely separate list of cookies and cookie parsing state, so thus parses them all over again. Moreover, it parses them differently to the o.e.j.s.Request.

For example, given the following cookie header, and a compliance mode of RFC6265:
$Version="1"; name1="value1"; $Path="/servlet_jsh_cookie_web"; $Domain="localhost"

The o.e.j.s.Request parsing produces the (correct) list:

$Version="1"
name1="value1"
$Path="/servlet_jsh_cookie_web"
$Domain="localhost"

The o.e.j.ee9.n.Request parsing produces the (incorrect) list:
name1="value1"

[janbartel]

Fixed