sunshine config and todo_rollover script

hosts/mainframe/sunshine/sunshine.conf

@@ -25,3 +25,16 @@ csrf_allowed_origins = https://10.0.0.2:47990,https://mainframe:47990,https://lo
 
 # Web UI reachable from the LAN, not just this machine.
 origin_web_ui_allowed = lan
+
+# Emulate an Xbox 360 pad regardless of what the client actually holds.
+# The default (auto) mirrors the client's controller, which for a DualSense
+# means Sunshine creates a PlayStation-style HID pad. Steam Big Picture claims
+# that pad through its own HID driver ("Controller 0 mapping uses xinput:
+# false" in ~/.local/share/Steam/logs/controller.txt) and hands input to games
+# only via the Steam Input API. Risk of Rain 2 uses Rewired/XInput and does not
+# speak Steam Input, so it saw a grabbed device and nothing else: the pad works
+# in the Steam UI and is dead the moment a game starts.
+#
+# x360 is the one type Wine's xinput maps directly, so Proton games get a
+# working pad whether or not Steam Input is in the way.
+gamepad = x360