* Fix SteamCMD error checking
Added `libcurl` as an excluded keyword for error checking. Was causing mod-timeout errors to be misreported as an unknown error.
* [DayZ] Image Cleanup
- Removed `numactl` dependency as it seems SteamCMD updated and resolved its crashing issues on Linux when logging in with a real account.
- Added clearing of SteamCMD appworkshop cache before mod downloads to avoid potential failures (at least until I implement a better method using symlinks for mod folders).
- General cleanup of text and labels.
* Fix missing `WORKSHOP_DIR` global var
- Utilize `numactl` to force SteamCMD to run on only one CPU which resolves its current crashing issues on Debian.
- SteamCMD now complains about thread priority due to it failing to properly load `libSDL` (`libSDL` is included in the image, but will not load properly if it is not installed on the host due to it containing a kernel extension). Therefore, any warnings regarding threads will now be ignored.
- If SteamCMD fatally crashes, copy the directory where it saves its dumps (`/tmp/dumps`) to `/home/container` for easier debugging access.
