MC backport (#16992)

* Break things

* fix bad replace in test code

code/__byond_version_compat.dm

@@ -0,0 +1,48 @@
+// This file contains defines allowing targeting byond versions newer than the supported
+
+//Update this whenever you need to take advantage of more recent byond features
+#define MIN_COMPILER_VERSION 514
+#define MIN_COMPILER_BUILD 1556
+#if (DM_VERSION < MIN_COMPILER_VERSION || DM_BUILD < MIN_COMPILER_BUILD) && !defined(SPACEMAN_DMM)
+//Don't forget to update this part
+#error Your version of BYOND is too out-of-date to compile this project. Go to https://secure.byond.com/download and update.
+#error You need version 514.1556 or higher
+#endif
+
+//If you update these values, update the message in the #error
+#define MAX_BYOND_MAJOR 514
+#define MAX_BYOND_MINOR 1589
+
+// You can define IGNORE_MAX_BYOND_VERSION to bypass the max version check.
+// Note: This will likely break the game, especially any extools/auxtools linkage. Only use if you know what you're doing!
+#ifdef OPENDREAM // Thanks, Altoids!
+#define IGNORE_MAX_BYOND_VERSION
+#endif
+
+#if ((DM_VERSION > MAX_BYOND_MAJOR) || (DM_BUILD > MAX_BYOND_MINOR)) && !defined(IGNORE_MAX_BYOND_VERSION)
+#error Your version of BYOND is too new to compile this project. Download version 514.1589 at www.byond.com/download/build/514/514.1589_byond.exe
+#endif
+
+// 515 split call for external libraries into call_ext
+#if DM_VERSION < 515
+#define LIBCALL call
+#else
+#define LIBCALL call_ext
+#endif
+
+// So we want to have compile time guarantees these procs exist on local type, unfortunately 515 killed the .proc/procname syntax so we have to use nameof()
+#if DM_VERSION < 515
+/// Call by name proc reference, checks if the proc exists on this type or as a global proc
+#define PROC_REF(X) (.proc/##X)
+/// Call by name proc reference, checks if the proc exists on given type or as a global proc
+#define TYPE_PROC_REF(TYPE, X) (##TYPE.proc/##X)
+/// Call by name proc reference, checks if the proc is existing global proc
+#define GLOBAL_PROC_REF(X) (/proc/##X)
+#else
+/// Call by name proc reference, checks if the proc exists on this type or as a global proc
+#define PROC_REF(X) (nameof(.proc/##X))
+/// Call by name proc reference, checks if the proc exists on given type or as a global proc
+#define TYPE_PROC_REF(TYPE, X) (nameof(##TYPE.proc/##X))
+/// Call by name proc reference, checks if the proc is existing global proc
+#define GLOBAL_PROC_REF(X) (/proc/##X)
+#endif