quick fix sticky buffers
quick fix sticky buffers

According to documention (https://suricata.readthedocs.io/en/suricata-6.0.3/rules/http-keywords.html#http-keywords) sticky buffers should be before content, http.header and http.uri isn't marked as sticky buffers, but rules are wrongly generated and reported to logs. Tested on stable Suricata v6.0.1+
SteveClement/MISP,MISP/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,SteveClement/MISP,SteveClement/MISP,MISP/MISP