fix misleading indentation

Support Mingw64 toolchain versions

it seems line_t have pointers, clear all of it

both Makefile and *.mk should be in the same EOL

Add support for GCC 13.2

This reverts commit 4f116673.

Let see, revert OBJCOPY,OBJDUMP and WINDRES statements

Also allow overwrite of OBJCOPY, OBJDUMP and WINDRES

The CV_NETVAR flag being used for cvars not registered in a dedicated server context will completely mess with the internal netid to cvar linkage.
And I'm not really keen on registering a cvar purely for rendering on dedicated servers, so let's just prevent renderhitbox from being changed in netgames entirely.

This has the effect of misrepresenting how many sprites are actually visible, but it's more "accurate".

- Tweaked Aether, Midnight and Volcanic
- Credit Chrispy & Saneko for new skincolors