Sync SDL_rtf header -> wiki

SDL_rtf/RTF_Version.md

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+###### (This function is part of SDL_rtf, a separate library from SDL.)
+# RTF_Version
+
+This function gets the version of the dynamically linked SDL_rtf library.
+
+## Header File
+
+Defined in SDL_rtf.h
+
+## Syntax
+
+```c
+int RTF_Version(void);
+
+```
+
+## Return Value
+
+Returns SDL_rtf version
+
+## Version
+
+This function is available since SDL_rtf 3.0.0.
+
+----
+[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction)
+

SDL_rtf/SDL_RTF_MAJOR_VERSION.md

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+###### (This function is part of SDL_rtf, a separate library from SDL.)
+# SDL_RTF_MAJOR_VERSION
+
+Printable format: "%d.%d.%d", MAJOR, MINOR, MICRO
+
+## Header File
+
+Defined in SDL_rtf.h
+
+## Syntax
+
+```c
+#define SDL_RTF_MAJOR_VERSION   3
+```
+
+----
+[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro)
+

SDL_rtf/SDL_RTF_VERSION.md

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+###### (This function is part of SDL_rtf, a separate library from SDL.)
+# SDL_RTF_VERSION
+
+This is the version number macro for the current SDL_rtf version.
+
+## Header File
+
+Defined in SDL_rtf.h
+
+## Syntax
+
+```c
+#define SDL_RTF_VERSION \
+    SDL_VERSIONNUM(SDL_RTF_MAJOR_VERSION, SDL_RTF_MINOR_VERSION, SDL_RTF_MICRO_VERSION)
+```
+
+----
+[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro)
+

SDL_rtf/SDL_RTF_VERSION_ATLEAST.md

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+###### (This function is part of SDL_rtf, a separate library from SDL.)
+# SDL_RTF_VERSION_ATLEAST
+
+This macro will evaluate to true if compiled with SDL_rtf at least X.Y.Z.
+
+## Header File
+
+Defined in SDL_rtf.h
+
+## Syntax
+
+```c
+#define SDL_RTF_VERSION_ATLEAST(X, Y, Z) \
+    ((SDL_RTF_MAJOR_VERSION >= X) && \
+     (SDL_RTF_MAJOR_VERSION > X || SDL_RTF_MINOR_VERSION >= Y) && \
+     (SDL_RTF_MAJOR_VERSION > X || SDL_RTF_MINOR_VERSION > Y || SDL_RTF_MICRO_VERSION >= Z))
+```
+
+----
+[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro)
+