Partially revert "Remove obsolete settings."
Partially revert "Remove obsolete settings."

This partially reverts commit 90cc27102aa1a37e3c7e1dfe92297a975bc158a4.

We had to re-enable optional encryption/integrity because of an issue
where HTCondor currently returns the IP instead of the alias:

53527005740d9c4434dabef39a27de1fd1b35ba4

brianhlin/htcondor-ce,opensciencegrid/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,opensciencegrid/htcondor-ce,matyasselmeci/htcondor-ce,matyasselmeci/htcondor-ce,opensciencegrid/htcondor-ce