acme: Handle log message correctly

Error was:
  logger: unrecognized option: renew

Signed-off-by: David Yang <mmyangfl@gmail.com>

net/acme/files/run.sh

@@ -32,17 +32,17 @@ check_cron()
 
 log()
 {
-    logger -t acme -s -p daemon.info "$@"
+    logger -t acme -s -p daemon.info -- "$@"
 }
 
 err()
 {
-    logger -t acme -s -p daemon.err "$@"
+    logger -t acme -s -p daemon.err -- "$@"
 }
 
 debug()
 {
-    [ "$DEBUG" -eq "1" ] && logger -t acme -s -p daemon.debug "$@"
+    [ "$DEBUG" -eq "1" ] && logger -t acme -s -p daemon.debug -- "$@"
 }
 
 get_listeners() {