syslog: have syslog generate timestamps (#1585)

This is the more elegant solution to #1579.

conf/init/service/nginx/log/run

@@ -4,6 +4,4 @@
 sv check syslog-ng > /dev/null || exit 1
 
 # Start the logger
-while read -r msg; do
-  logger -i -t nginx "$msg"
-done
+exec logger -i -t nginx