Stop parsing unsupported dhcp-options(5)

dhcpleased(8) does not support everything dhclient(8) did,
so stop pretending.

OK florian

Author: klemensn

distrib/miniroot/install.sub

@@ -1,5 +1,5 @@
 #!/bin/ksh
-#	$OpenBSD: install.sub,v 1.1173 2021/08/24 21:50:09 bluhm Exp $
+#	$OpenBSD: install.sub,v 1.1174 2021/08/29 13:05:43 kn Exp $
 #
 # Copyright (c) 1997-2015 Todd Miller, Theo de Raadt, Ken Westerback
 # Copyright (c) 2015, Robert Peichaer <rpe@openbsd.org>
@@ -629,14 +629,13 @@ get_responsefile() {
 		fi
 
 		# Extract installer mode and response file path from lease file.
-		_aifile=$(lease_value $_lf filename bootfile-name)
+		_aifile=$(lease_value $_lf filename)
 		[[ $_aifile == ?(*/)auto_@(install|upgrade) ]] || _aifile=
 		_path=${_aifile%auto_@(install|upgrade)}
 		AI_MODE=${_aifile##*?(/)auto_}
 
 		# Extract install server ip address from lease file.
-		AI_SERVER=$(lease_value $_lf \
-			server-name tftp-server-name next-server)
+		AI_SERVER=$(lease_value $_lf next-server)
 
 		# Prime hostname with host-name option from lease file.
 		AI_HOSTNAME=$(lease_value $_lf host-name)