openconnect: implement --no-external-auth

The option prevents OpenConnect from advertising 
to the server that it supports any kind of 
authentication mode that requires an external 
browser. Some servers will force the client to use such 
an authentication mode if the client advertises it, but 
fallback to a more "scriptable" authentication mode if 
the client doesn’t appear to support it.

Signed-off-by: Thomas Winkler <tewinkler86@gmail.com>

net/openconnect/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=openconnect
 PKG_VERSION:=9.12
-PKG_RELEASE:=6
+PKG_RELEASE:=7
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://www.infradead.org/openconnect/download

net/openconnect/files/openconnect.sh

@@ -23,6 +23,7 @@ proto_openconnect_init_config() {
 	proto_config_add_string "vpn_protocol"
 	proto_config_add_boolean "pfs"
 	proto_config_add_boolean "no_dtls"
+	proto_config_add_boolean "no_external_auth"
 	proto_config_add_string "interface"
 	proto_config_add_string "username"
 	proto_config_add_string "serverhash"
@@ -58,6 +59,7 @@ proto_openconnect_setup() {
 		juniper \
 		vpn_protocol \
 		mtu \
+		no_external_auth \
 		no_dtls \
 		os \
 		password \
@@ -107,6 +109,7 @@ proto_openconnect_setup() {
 	[ -n "$script" ] && append_args --script "$script"
 	[ "$pfs" = 1 ] && append_args --pfs
 	[ "$no_dtls" = 1 ] && append_args --no-dtls
+	[ "$no_external_auth" = 1 ] && append_args "--no-external-auth"
 	[ -n "$mtu" ] && append_args --mtu "$mtu"
 
 	# migrate to standard config files