Changed DBRAINx textures to a lava-fall

Height has been extended to 128, and new patches have been added (LFALLx) and are used instead of RWDM11x. I am deliberately leaving the original patches as-is, for the sake of PWAD compatibility.

lumps/textures/textures.cfg

@@ -999,14 +999,14 @@ CRACKLE2        64      128
 *   RW44_2      0       0
 CRACKLE4        64      128
 *   RW44_4      0       0
-DBRAIN1         64      32
-*   RWDM11A     0       0
-DBRAIN2         64      32
-*   RWDM11B     0       0
-DBRAIN3         64      32
-*   RWDM11C     0       0
-DBRAIN4         64      32
-*   RWDM11D     0       0
+DBRAIN1         64      128
+*   LFALL1      0       0
+DBRAIN2         64      128
+*   LFALL2      0       0
+DBRAIN3         64      128
+*   LFALL3      0       0
+DBRAIN4         64      128
+*   LFALL4      0       0
 MARBFAC4        64      128
 *   RW7_3       0       0
 METAL3          64      128