sslh: add transparent proxy support

Signed-off-by: Gabor Seljan <sgabe@users.noreply.github.com>

net/sslh/files/sslh.config

@@ -28,5 +28,8 @@ config 'sslh' 'default'
 	# verbose defaults to off
 	# -v
 	option 'verbose' '0'
+	# transparent defaults to false
+	# --transparent
+	option 'transparent' '0'
 	# use external config file
 	# option configfile '/etc/sslh.conf'

net/sslh/files/sslh.init

@@ -47,6 +47,9 @@ start_instance() {
 	# J) http parameter
     config_get val "${section}" http
     [ -n "${val}" ] && append args "--http ${val}"
+	# K) transparent parameter
+	config_get_bool val "${section}" transparent 0
+	[ "${val}" -ne 0 ] && append args "--transparent"
 
 	# Defaults were removed for --user and --pidfile options
 	# in sslh 1.11; Define them here instead.