Add DSU joystick driver#14325

Draft

danprice142 wants to merge 3 commits intolibsdl-org:SDL2from

danprice142:SDL2

Commits on Oct 25, 2025

Add DSU joystick driver
danprice142
committed
Fix C90 compatibility issues in DSU joystick driver for Haiku build
danprice142
committed
Add DSU joystick support with proper network library linking for Haiku and Unix systems
danprice142
committed