Check protocol id length so that scanner don't overrun buffer
Check protocol id length so that scanner don't overrun buffer

ahnan4arch/spdylay,ahnan4arch/spdylay,tatsuhiro-t/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,ahnan4arch/spdylay,ahnan4arch/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,tatsuhiro-t/spdylay,mixianghang/spdylay,mixianghang/spdylay,ahnan4arch/spdylay