Fully implemented ConVar class so we could statically construct all SDK convars, this avoids a level of indirection, and allows for creating ConVar's everywhere in the project.
This patch also removed the settings tab of the ImGui server browser, as it has threading issues, while it technically never caused a crash yet, it has been removed as there was no point keeping it vs the work required to make it thread save (it only managed 2 convars which are perfectly manageable through cfg's or the in-game console).
Also temporarily disabled the creation of ConVar's in the mod system due to a memory leak, we would allocate and register a convar based on details parsed out of a mod file definition, but never unregister and free it.
Properly implement the ConCommandBase and ConCommand classes so we could statically construct all ConCommand objects in the global scope of each translation unit, this way we don't need to put them in a global file and deal with preprocessor directives to compile then in/out for certain projects.
Avoid heap memory allocation and a level of indirection. This allows the compiler to optimize the program even more. No logic has been changed in this patch.
The KeyValues class belongs here. Also reimplemented most loading methods for KeyValues, and adjusted the VPK building code to account for it. Pointers to the engine's implementation of KeyValues have been moved to a separate header ('keyvalues_iface.h'), as this allows external tools code to utilize the standalone KeyValues class implementation. Playlist utilities are completely separated from the KeyValues header; these have nothing to do with KeyValues other than manipulating a global KeyValues object for the playlists, and thus have been named as such and moved to rtech/playlists.
Display the EULA (fetched from masterserver), which the end user MUST accept before they can make use of the multiplayer features of R5Reloaded. NOTE: user doesn't need to agree to this to use the listenserver.
They were all strings; changed them to what made most sense for each field type. Changes:
"hidden": string -> bool
"port": string -> int
"checksum": string -> uint
"playerCount": string -> int
"maxPlayers": string -> int
