Revert "Revert "don't allow a HifiSockAddr lookup to block application""

This reverts commit fabc3aea5709960744a72f187c86573bb5351302.
allow a blocking lookup of IP address in HifiSockAddr
cleanup some debug in HifiSockAddr for hostname lookup
Merge branch 'master' of https://github.com/highfidelity/hifi into network-timeout
Merge pull request #3724 from birarda/network-timeout

fix for reverted HifiSockAddr IP lookup in assignment clients