connman: update to connman-1.23

Signed-off-by: Stephan Raue <stephan@openelec.tv>
connman: Require dbus.socket instead of syslog.target in systemd unit files

Signed-off-by: Stephan Raue <stephan@openelec.tv>

Conflicts:
	packages/network/connman/system.d/connman-vpn.service
glib: update to glib-2.40.0

Signed-off-by: Stephan Raue <stephan@openelec.tv>