Meas: separate the meas_json task

This allows more than one client to open the web meas

modules/rhizo_base/files/etc/sv/meas-json/log/run

@@ -0,0 +1,4 @@
+#!/bin/sh
+LOG_FOLDER=/var/log/meas-json
+mkdir -p $LOG_FOLDER
+exec svlogd -tt $LOG_FOLDER

modules/rhizo_base/files/etc/sv/meas-json/run

@@ -0,0 +1,4 @@
+#!/bin/bash
+exec 2>&1
+
+exec /usr/bin/stdbuf -oL /usr/bin/meas_json > /tmp/json_pipe