li vedi nel phpinfo... e variano a seconda delle impostazioni del browser, questi sono i miei

codice:
HTTP Request 	 GET /phpinfo.php HTTP/1.1
Host 	 	 localhost
User-Agent 	 Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8) Gecko/20051111 Firefox/1.5
Accept    	 text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Language  it-it,it;q=0.8,en-us;q=0.5,en;q=0.3
Accept-Encoding  gzip,deflate
Accept-Charset   ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive 	 300
Connection 	 keep-alive
Cookie 	   	 cookie=valore