If we're running setuid/setguid then don't open the host alias file to prevent information leakage.
If we're running setuid/setguid then don't open the host alias file to
prevent information leakage.

Closes PR 2578

Submitted by:	Julian Assange

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase