Use new config file finder when loading config file

src/saturnin.sh.skel

     local found=false
     while read -r path;
     do
-        test -f "$path" || continue
         found=true
         case $Strategy in
             first)
     # with 'first' strategy, first existing file is printed, with
     # 'join' strategy. all existing files are printed.
     #
-    local arg trydir trypath es
+    local arg es
     es=0
     for arg in "$@";
     do
                 cat "$arg" || es=3
             ;;
         *)              # name given, find all its incarnations
-            debug -v SATURNIN_CONF_PATH
-            echos "$SATURNIN_CONF_PATH" \
-              | tr ':' '\n' \
-              | while read -r trydir;
-                do
-                    test -n "$trydir" || continue
-                    trypath="$trydir/$arg"
-                    echos "$trypath"
-                done \
+            saturnin__conf_find "$arg" \
               |  _saturnin__conf__merge; es=$?
             ;;
         esac