runit: add dependencies to loggers (#1515)

This guarantees that the logger starts after syslog and the process it's
logging.

conf/init/service/nginx/log/run

@@ -1,2 +1,9 @@
 #!/bin/sh
-exec logger -i -t nginx
+
+# Ensure dependencies start before the logger
+sv start syslog-ng || exit 1
+sv start nginx || exit 1
+sleep 1
+
+# Start the logger
+exec logger -i -t nginx