- Changed random seed initialization so that it uses the system's

cryptographically secure random number generator, if available, instead
  of the current time.
- Changed the random number generator from Lee Killough's algorithm to the
  SFMT607 variant of the Mersenne Twister.

SVN r1507 (trunk)

src/d_main.cpp

@@ -1580,7 +1580,7 @@ void D_DoomMain (void)
 
 	SetLanguageIDs ();
 
-	rngseed = (DWORD)time (NULL);
+	rngseed = I_MakeRNGSeed();
 	FRandom::StaticClearRandom ();
 	M_FindResponseFile ();