D-Hole Code For Openscad

I needed to be able to make single and double "D" holes in panels for connectors, switches etc. Whilst there are several ways it can be done I tried to produce some general purpose code. Hopefully the attached achieves that! As attached it contains some test code and should be fairly self explanatory. I couldn't find any code online but I might have missed it!
Anyway I hope it will help somebody else.

To use, either copy the module you need into your code and then call it with the syntax shown or remove the test code and place the remainder into your library. Then "include" the library and call the module as required.

Just my small contribution to the people using Thingiverse who have provided much help over the years.