Update comments

modules/genmf

@@ -25,8 +25,8 @@ do
     extra_ltlibs="${extra_ltlibs} lib${mod}_plugin.la"
   done
   rm -f "${makf}" && cat > "${makf}" << EOF
-# ${makf} automatically generated from ${modf} by bootstrap
-# DO NOT EDIT - edit Modules.am or \$(top_srcdir)/bootstrap instead
+# ${makf} automatically generated from ${modf} by $0
+# DO NOT EDIT THIS FILE DIRECTLY! See Modules.am instead.
 
 basedir = ${basedir}
 dir = ${dir}