Fixing None checks for http_port and server_port
Fixing None checks for http_port and server_port

We should be checking http_port and server_port against None instead of
using implicit false behavior, because we're just trying to see if it's
set vs. unset. A port number of 0 should not be treated the same as a
port that is not set.

fernandalavalle/mlab-ns,m-lab/mlab-ns,fernandalavalle/mlab-ns,m-lab/mlab-ns,m-lab/mlab-ns,fernandalavalle/mlab-ns,m-lab/mlab-ns,fernandalavalle/mlab-ns