Change ap_get_list_item to treat comments like a quoted string

rather than strip them.  This corresponds to the expectation that
future HTTP fields will only use comments when they are useful.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82789 13f79535-47bb-0310-9956-ffa450edef68