Sol Skies: the solar system Sol01 and the jump drives, part 3/5

The server takes at most a few hundred MB a push: this comes in parts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

DATA/UNIVERSE/interstellar.ini

@@ -0,0 +1,15 @@
+; SOL SKIES: the star sphere of interstellar space - the space between the systems of the open world (multiplayer
+; with the world map). The client fades it in as the ship leaves a system's own space and that system's star sphere
+; fades out (Sol-Skies-Client star_sys.cpp RemInterstellarDraw). The keys are those of a system's [Background]:
+; .cmp files, relative to DATA. Without a [Background] here nothing changes (the system's stars stay).
+;
+; Put the files into DATA\SOLAR\STARSPHERE\interstellar\ and remove the semicolons:
+;
+;[Background]
+;basic_stars = solar\starsphere\interstellar\interstellar_basic_stars.cmp
+;complex_stars = solar\starsphere\interstellar\interstellar_complex_stars.cmp
+;nebulae = solar\starsphere\interstellar\interstellar_nebula.cmp
+
+; the music out between the systems (a [Sound] of DATA\AUDIO\music.ini): Sol's space music
+[Music]
+space = music_ls_deep_space