Merge pull request #3531 from birarda/domain-tunnel

initial pass at using an ice-server to allow interface to connect to domains without open ports
Fix for normalization crash.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Merge pull request #3534 from ey6es/metavoxels

Fix for normalization crash.
tell the data-server about auto networking change to full