use_prefix_for_ethercat_conf_path.p0.patch

diff -r 9e65f782e8a1 script/ethercatctl.in
--- script/ethercatctl.in	Tue Feb 13 17:16:01 2018 +0100
+++ script/ethercatctl.in	Thu May 24 11:47:23 2018 +0200
@@ -42,7 +42,7 @@
 
 #------------------------------------------------------------------------------
 
-ETHERCAT_CONFIG=/etc/ethercat.conf
+ETHERCAT_CONFIG=@prefix@/etc/ethercat.conf
 
 if [ ! -r ${ETHERCAT_CONFIG} ]; then
     echo ${ETHERCAT_CONFIG} not existing;