Drop support for miniupnpc versions less than 1.6.
Drop support for miniupnpc versions less than 1.6.

aurarad/auroracoin,aurarad/auroracoin,tutor-web/smileyCoin,aurarad/auroracoin,tutor-web/Auroracoin,tutor-web/Auroracoin,tutor-web/smileyCoin,tutor-web/smileyCoin,tutor-web/Auroracoin,tutor-web/smileyCoin,aurarad/auroracoin,tutor-web/Auroracoin,tutor-web/smileyCoin,tutor-web/Auroracoin,aurarad/auroracoin