move source dehacked to dedicated subdirectory

lumps/Makefile

@@ -1,12 +0,0 @@
-CPP=../scripts/simplecpp
-
-all: fdm_deh.lmp p1_deh.lmp p2_deh.lmp
-
-fdm_deh.lmp: dehacked.lmp
-	$(CPP) -DFREEDM < $< > $@
-
-p1_deh.lmp: dehacked.lmp
-	$(CPP) -DPHASE1 < $< > $@
-
-p2_deh.lmp: dehacked.lmp
-	$(CPP) -DPHASE2 < $< > $@

lumps/dehacked/Makefile

@@ -0,0 +1,15 @@
+CPP=../../scripts/simplecpp
+
+all: ../fdm_deh.lmp ../p1_deh.lmp ../p2_deh.lmp
+
+../fdm_deh.lmp: dehacked.txt
+	$(CPP) -DFREEDM < $< > $@
+
+../p1_deh.lmp: dehacked.txt
+	$(CPP) -DPHASE1 < $< > $@
+
+../p2_deh.lmp: dehacked.txt
+	$(CPP) -DPHASE2 < $< > $@
+
+clean:
+	$(RM) ../fdm_deh.lmp ../p1_deh.lmp ../p2_deh.lmp

lumps/dehacked/README

@@ -0,0 +1,10 @@
+This directory contains the source DeHackEd patch used for Freedoom.
+
+We generate three unique files for each IWAD, most of the data being
+identical to each other.
+
+- FreeDM has all par times set to 0 and the map names would otherwise
+  override Phase 2.
+- We override the no-clipping cheat in Phase 1 so IDCLIP is used in
+  all games.
+- Phase 2 has map names that would otherwise override FreeDM.