Add QingPu WQP-PJ398SM aka Thonkiconn

QingPu 3.5 mm vertical audio jacks. Commonly used for Eurorack synth modules. Popularly referred to as Thonkiconn (https://www.thonk.co.uk/shop/thonkiconn/).

For symbol Connector:AudioJack2_Ground_Switch

No data sheet, only a web page at http://www.qingpu-electronics.com/en/products/WQP-PJ398SM-362.html

Pad holes are round not slotted for more economical manufacture, Hole diameter is the maximum lead diameter (on the diagonal) plus 0.2mm.