Switch to Python 3.x
Python 2.7.x is not long for this world, going EOL on Jan 1, 2020
We need to ensure the base packages and other packages that require python 2.7 can be moved to python 3.6 or later.
pfSense itself does not have any direct dependencies, but some base packages do such as Unbound, bind-tools, rrdtool (via glib). Additionally, pfSense packages like FreeRADIUS, cellular, and Suricata show dependencies on python 2.7.
Renato has already started this work, and most items build successfully with python 3.6, though more testing is warranted.