RES_CONF parameter == RES_CONF=URL
-- default: RES_CONF="file:/etc/resolv.conf"
or from registry (on Windows)
Specify where the "resolv.conf" file is. The file is interpreted
by the DeleGate original resolver named Resolvy.
Resolvy recognizes "nameserver", "domain", "ndots", "search", and
"sortlist" in it.