Transform hostname to lower case
Transform hostname to lower case

Hostnames are supposed to be case independent. Comparing them will work
better if we convert them all to lower case as soon as possible.

guidow/pyfarm-agent,guidow/pyfarm-agent,guidow/pyfarm-agent,pyfarm/pyfarm-agent,pyfarm/pyfarm-agent,pyfarm/pyfarm-agent