dnscrypt-proxy2: add init script using procd

Signed-off-by: Adam Mizerski <adam@mizerski.pl>
Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
(cherry-picked from commit cc4ed96063)

net/dnscrypt-proxy2/files/dnscrypt-proxy.init

@@ -0,0 +1,21 @@
+#!/bin/sh /etc/rc.common
+
+USE_PROCD=1
+
+# starts before dnsmasq starts
+START=18
+# stops before networking stops
+STOP=89
+
+PROG=/usr/sbin/dnscrypt-proxy
+CONFIGFILE=/etc/dnscrypt-proxy2/dnscrypt-proxy.toml
+
+start_service() {
+        procd_open_instance
+        procd_set_param command "$PROG" -config "$CONFIGFILE"
+        procd_set_param file "$CONFIGFILE"
+        procd_set_param stdout 1
+        procd_set_param stderr 1
+        procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
+        procd_close_instance
+}