openlierox-0.58_rc5-bp155.2.5

- Fix building for openSUSE Leap: use gcc11

- Switch to pkgconfig(sdl) to build with sdl12_compat.

- Update to version 0.58_rc5
  * IPv6 support
  * Show death count in games with infinite lives
  * Navigate all menus with arrow keys. This should allow to control
    the game using only gamepad, with no mouse.
  * Fixed rope warping and explosions not drawn on infinite map.
  * Fixed desynced shots in network games.
  * Fixed invisible laser in network games.
  * New game options: mirror the map to make infinite map edges
    less obvious, and indestructible bonuses.
  * Added all player skins from Quality Skins Pack.
  * Fixed servers registering on masterserver with IPv6 address.
  * Show weapon name when picking up a bonus or when the server
    forces new weapons for a client.
- Dropped upstream merged appdata.patch and desktop.patch
- Dropped outdated patches openlierox-0.58-gcc6.patch,
  openlierox-0.58_rc1-curl.patch and openlierox-0.58_rc1-icu.patch

- unbundle hawknl
- add desktop.patch to adhere to FreeDesktop standards properly
- add appdata.patch for https://en.opensuse.org/openSUSE:AppStore
- add openlierox-0.58-gcc6.patch to fix the build

- Remove redundant/unwanted tags/section (cf. specfile guidelines)
- Use %_smp_mflags for parallel building

- Make the package actually work and build

- Initial commit of OpenLieroX, install is still broken.