Clarify the need of the SUID cp+chmod command in the examples

_layouts/bin.html

@@ -24,6 +24,8 @@ layout: common
 
 {% capture code %}
 {%- if function_id == 'suid' or function_id == 'limited-suid' %}
+# create a local SUID copy of the binary for the sake of the example
+# in a real world scenario ignore this line and use the proper path below
 sudo sh -c 'cp $(which {{ bin_name }}) .; chmod +s ./{{ bin_name }}'
 {% endif %}
 {%- if function_id == 'capabilities' %}