dvdplayer: add missing lock to message queue
Merge pull request #5375 from FernetMenta/locks

dvdplayer: add missing lock to message queue
Read and expose axis-to-trigger mappings from keymap
[configure] Moved xbmc to SDL2
[depends] move to SDL2 for linux
[linux] Rewrite SDL_Joystick to use SDL2: adds hotplug support, correctly handles multiple joysticks and improves axis handling
[windows] WINJoystick: correctly handle multiple joystick and improve triggers
Update Application to accomodate for CJoystick signature changess and pass axis config to it
Use regexes for joystick names in ButtonTranslator keymaps
[keymap] Add trigger attributes to 360 controller + altname for Razer Sabertooth
[keymap] Update PS3 keymap to use a regex name so it works OOB with sixad