Built SDL2_image and _mixer static

libsdl2_mixer/external/mpg123-1.25.6/doc/LICENSE

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+GNU says that the license terms go into a file called COPYING.
+Go over to COPYING to read the license, then.
+
+Or...
+
+You stay a bit with me here and read some not really important text.
+You could imagine that there was some important text here, though.
+You could also imagine that you were not sitting
+	in your office / living room / bathroom
+		in front of one of these evil electronic brains
+		(you didn't _print_ this file, did you?)
+	but being at some happy place, far, far away.
+You could also imagine being at some unhappy place.
+If you indeed are at such an unhappy place, imagine you were sitting
+	in your office / living room / bathroom
+		in front of this shiny, though evil, electronic brain.
+		Reading this pointless text.
+			Wondering about what you could have achieved in the past moments
+				if you wouldn't have continued reading this pointless text.
+		Wondering if anything is worth being achieved at all.
+	Or if it all is just...
+pointless.