acme: Add package.

This adds a package wrapping the acme.sh script from
https://github.com/Neilpang/acme.sh in Uci config and hooks to interact
correctly with uhttpd.

Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>

net/acme/files/acme.init

@@ -0,0 +1,34 @@
+#!/bin/sh /etc/rc.common
+
+USE_PROCD=1
+
+START=50
+SCRIPT=/usr/lib/acme/run-acme
+
+start_service()
+{
+    procd_open_instance
+    procd_set_param command $SCRIPT
+    procd_set_param file /etc/config/acme
+    procd_set_param stdout 1
+    procd_set_param stderr 1
+    procd_close_instance
+}
+
+reload_service() {
+    rc_procd start_service "$@"
+    return 0
+}
+
+stop_service() {
+    return 0
+}
+
+boot() {
+    $SCRIPT check_cron
+}
+
+service_triggers()
+{
+    procd_add_reload_trigger acme
+}