--regex to make __addifnosuchline more flexible

conf/type/__addifnosuchline/explorer/findline

@@ -26,12 +26,18 @@ else
    file="/$__object_id"
 fi
 
-regex=$(cat "$__object/parameter/line")
+if [ -f "$__object/parameter/regex" ]; then
+    regex=$(cat "$__object/parameter/regex")
+else
+    wrap=$(cat "$__object/parameter/line")
+    regex="^$wrap\$"
+fi
+
 if [ -f "$file" ]; then
    # sh -e is our environment, we know what we do,
    # skip error detection for now
    set +e
-   grep -q "^$regex\$" "$file"
+   grep -q "$regex" "$file"
    if [ $? -eq 1 ]; then
       echo "NOTFOUND"
    else

conf/type/__addifnosuchline/parameter/optional

@@ -1 +1,2 @@
 file
+regex