curl::option CurlHandle,"NOHTTPHEADER"
Use this option to delete all previous HTTPHEADER options. This may be needed when you use a single CURL connection to download several pages from the same server and did not call curl::finish and curl::init() again. Until you call curl::finish or specify this option all header lines remain effective.
After setting this option you can set various HTTPHEADER option strings to build up a new list.