The Cache Control header and {TAIL ~ its operation} are explained in paragraphs 12.8 and 13 of {HEAD ~ the RFC} 2326 
The Cache Control header and { TAIL ~ its operation } are explained in paragraphs 12.8 and 13 of { HEAD ~ the RFC } 2326
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH