Dedup duplicate tracks.

Some of Doom's music tracks are reused for multiple levels. In some
cases these different lumps have the same hash but there are several
where the hash is different even though the music is the same. So,
reduce the set of filenames in the Doom 1 config file, based on the
data from this page:

  <https://doomwiki.org/wiki/Doom_music>

This should allow smaller music packs to be produced - the config file
lists exactly which files should be included to cover all of Doom's
music, without any ambiguity.

doom1-music.cfg

@@ -16,7 +16,6 @@ f546ed823b234fe391653029159de7b67a15dbd4 = doom1-music/d_e1m5.flac
 62c631c2fdaa5ecd9a8d8f369917244f27128810 = doom1-music/d_e1m9.flac
 7702a6449585428e718558d8ecc387ef1a21d948 = doom1-music/d_e2m1.flac
 1cb1810989cbfae2b29ba8d6d0f8f1175de45f03 = doom1-music/d_e2m2.flac
-4a5badc4f10a7d4ed021e5d1cc470c1da728a741 = doom1-music/d_e2m3.flac
 7d740f3c881a22945e472c68754fd9485cb04750 = doom1-music/d_e2m4.flac
 ae9c3dc2f9aeea002327a5204d080ea82505a310 = doom1-music/d_e2m6.flac
 b26aad3caa420e9a2c76586cd59433b092fcba1c = doom1-music/d_e2m7.flac
@@ -24,18 +23,21 @@ b26aad3caa420e9a2c76586cd59433b092fcba1c = doom1-music/d_e2m7.flac
 b2fb439f23c08c8e2577d262e5ed910a6a62c735 = doom1-music/d_e3m1.flac
 b6c07bb249526b864208922d2d9ab655f4aade78 = doom1-music/d_e3m2.flac
 ce3587ee503ffe707b2d8b690396114fdae6b411 = doom1-music/d_e3m3.flac
-36b14bf165b3fdd3958ee83e4929063f051ada2f = doom1-music/d_e3m5.flac
-e77c3d42f2ea87f046074bd4e3ff1e535da1c653 = doom1-music/d_e3m6.flac
-3d85ec9c10b5ea46556899cfba701a556e27ca34 = doom1-music/d_e3m7.flac
 d746ea2aa16b3237422cb18ec66f26e12cb08d40 = doom1-music/d_e3m8.flac
-4d42e2ce1c1ff192500e7a08e72c85fe59741487 = doom1-music/d_e3m9.flac
 3da3b1335560a92912e6d1eb542ba8c65dcb1d2c = doom1-music/d_bunny.flac
 
+# Duplicates that don't have identical hashes:
+4a5badc4f10a7d4ed021e5d1cc470c1da728a741 = doom1-music/d_inter.flac  # E2M3
+36b14bf165b3fdd3958ee83e4929063f051ada2f = doom1-music/d_e1m7.flac   # E3M5
+e77c3d42f2ea87f046074bd4e3ff1e535da1c653 = doom1-music/d_e1m6.flac   # E3M6
+3d85ec9c10b5ea46556899cfba701a556e27ca34 = doom1-music/d_e2m7.flac   # E3M7
+4d42e2ce1c1ff192500e7a08e72c85fe59741487 = doom1-music/d_e1m9.flac   # E3M9
+
 # These tracks are reused in Alien Vendetta, but are MIDs:
 a05e45f67e1b64733fe31867ba759be0b9327a74 = doom1-music/d_e2m1.flac   # MAP02
 8024ae1616ddd97ce33079276458479c9e15ad5f = doom1-music/d_e1m4.flac   # MAP03
 3af8d79ddba49edaf9eba5e04d258d71b19b3782 = doom1-music/d_victor.flac # MAP05
-a55352c96c025b6bd08a6d9112bda72504be89ff = doom1-music/d_e2m3.flac   # MAP07
+a55352c96c025b6bd08a6d9112bda72504be89ff = doom1-music/d_inter.flac  # MAP07
 76d1fc25ab7b1b4a58d6e6203b0bb0c50689ee71 = doom1-music/d_e1m8.flac   # MAP11
 497777f0863eca7cea8763316fe6d56d599b5f84 = doom1-music/d_e1m2.flac   # MAP12
 0228fd87f8762f112fb60c601a7b43ba3b85f97e = doom1-music/d_e2m2.flac   # MAP13