go through this docu http://www.lpar2rrd.com/https.htm to assure you have LWP version > 6.x
When it does not help then removing of openssl package might resolve it (at least we have seen that once).
You have installed opens as rrdtool dependency, remove it, it does not affect AIX system opensssl : lslpp -L | grep -i opens
rpm -qa| grep openss
rpm -q <package>