refactor: simplify g_cvar.h - #888
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Adding new CVARs is a big headache, let's fix it, using clever macro trickery: include the same file in multiple places, but make its output different depending on the surrounding `#define`s. The approach is taken from OpenJK, apparently it was introduced in JACoders/OpenJK@b319c52 Similar MR in another project: https://github.com/ec-/baseq3a/pull/25. How this commit was made: 1. Create the `*_cvar.h` files 2. Move the lines from `cvarTable_t`s to the `*_cvar.h` files, do simple search and replace to format the lines. 3. Remove `vmCvar_t mycvar;` declarations (replace with `#include`). 4. Remove `extern vmCvar_t mycvar;` (replace with `#include`). Note that this keeps `ui_serverFilterType` and `cg_gun_frame` out of the CVAR table, so as to not change behavior, although it would probably make sense to add them. But let's keep that for another commit. Regarding the copyright status of this: the mentioned projects' licenses are not compatible with GPL-2.0-or-later. But basically all I took from those projects is the idea, otherwise I've written this commit by hand. I also tried to preserve the general coding style of those two projects, so that they're easier to compare. I'm adding @LegendaryGuard as a copyright owner because they expressed the desire to license this under GPL-2.0-or-later, see https://github.com/ec-/baseq3a/pull/25. Co-authored-by: LegendaryGuard <rootuser999@gmail.com>
It's always 0, there is no need to specify it.
So that you don't have to go to declaration every time you want to figure out what this `qfalse` and `qtrue` is referring to.
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This is a follow-up to
#887.
Similar MR in another project:
https://github.com/ec-/baseq3a/pull/86.