fix DSM7 running with su command:

SynoCommunity#4395 (comment)

Author: publicarray

mk/spksrc.service.start-stop-status

@@ -35,10 +35,10 @@ start_daemon ()
             else
                 SVC_CD="cd ${SVC_CWD}; "
             fi
-            if [ -n "${SYNOPKG_DSM_VERSION_MAJOR}" ] && [ "$SYNOPKG_DSM_VERSION_MAJOR" -gt 7 ]; then
-                SU=""
-            else
+            if [ -n "${SYNOPKG_DSM_VERSION_MAJOR}" ] && [ "$SYNOPKG_DSM_VERSION_MAJOR" -lt 7 ]; then
                 SU="su ${EFF_USER} -s"
+            else
+                SU=""
             fi
             if [ -z "${SVC_BACKGROUND}" ]; then
                 $SU ${SERVICE_SHELL} -c "${SVC_CD}${SERVICE_COMMAND}" >> ${OUT} 2>&1