Added members to support caching. Added accessors for cache control. libwww 5.2.9 does not supoort these, however.
Added members to support caching.
Added accessors for cache control. libwww 5.2.9 does not supoort these,
however.


OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap,OPENDAP/libdap,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4,OPENDAP/libdap4