Adding OpenConnect Override Scripts

Adding OpenConnect no-dtls override scripts which are necessary for
the broken VPN servers at Overstock.

openconnect.usr.bin

+#!/usr/bin/env bash
+
+# Networkmanager override to set no-dtls this is required for
+# Overstock Juniper Pulse VPN as they do not have proper UDP set up
+# and without that, CPU shoots over 100% and the logs fill up fast.
+#
+# Found the binary path search order in
+# https://gitlab.gnome.org/GNOME/NetworkManager-openconnect/\
+# blob/master/src/nm-openconnect-service.c
+#
+# static const char *openconnect_binary_paths[] =
+# {
+# 	"/usr/bin/openconnect",
+# 	"/usr/sbin/openconnect",
+# 	"/usr/local/bin/openconnect",
+# 	"/usr/local/sbin/openconnect",
+# 	"/opt/bin/openconnect",
+# 	"/opt/sbin/openconnect",
+# 	NULL
+# };
+#
+# And found the hint of which flag to add on the OpenConnect Wiki
+#
+# The second phase uses that cookie to connect to a tunnel via HTTPS,
+# and data packets can be passed over the resulting connection. When
+# possible, a UDP tunnel is also configured: AnyConnect uses DTLS,
+# while Juniper and GlobalProtect use UDP-encapsulated ESP. The UDP
+# tunnel may be disabled with --no-dtls, but is preferred when
+# correctly supported by the server and network for performance
+# reasons. (TCP performs poorly and unreliably over TCP-based
+# tunnels; see http://sites.inka.de/~W1011/devel/tcp-tcp.html.)
+# https://www.infradead.org/openconnect/manual.html
+#/usr/sbin/openconnect --no-dtls ${@}
+
+/usr/local/sbin/openconnect

openconnect.usr.local.sbin

+#!/usr/bin/env bash
+
+/usr/sbin/openconnect --no-dtls "${@}"