splitting cmd.c, phase I

Preparation for moving enlightenment and conduct into new source
file insight.c.  Right now it's a stub that shouldn't break anything
whether included or omitted.  Once makefiles and project files have
been updated to compile and link it, the actual code will be moved.

unix/Makefile.src has been updated;
vms/Makefile.src and vmsbuild.com have been updated but not tested.

sys/vms/Makefile.src

@@ -148,7 +148,8 @@ HACKCSRC = allmain.c alloc.c apply.c artifact.c attrib.c ball.c bones.c \
 	   botl.c cmd.c dbridge.c decl.c detect.c dig.c display.c dlb.c do.c \
 	   do_name.c do_wear.c dog.c dogmove.c dokick.c dothrow.c drawing.c \
 	   dungeon.c eat.c end.c engrave.c exper.c explode.c extralev.c \
-	   files.c fountain.c hack.c hacklib.c invent.c light.c lock.c \
+	   files.c fountain.c hack.c hacklib.c \
+	   insight.c invent.c light.c lock.c \
 	   mail.c makemon.c mapglyph.c mcastu.c mhitm.c mhitu.c minion.c \
 	   mklev.c mkmap.c \
 	   mkmaze.c mkobj.c mkroom.c mon.c mondata.c monmove.c monst.c \
@@ -194,7 +195,8 @@ HOBJ1 = allmain.obj,alloc.obj,apply.obj,artifact.obj,attrib.obj, \
 	detect.obj,dig.obj,display.obj,dlb.obj,do.obj,do_name.obj,do_wear.obj
 HOBJ2 = dog.obj,dogmove.obj,dokick.obj,dothrow.obj,drawing.obj, \
 	dungeon.obj,eat.obj,end.obj,engrave.obj,exper.obj,explode.obj, \
-	extralev.obj,files.obj,fountain.obj,hack.obj,hacklib.obj,invent.obj
+	extralev.obj,files.obj,fountain.obj,hack.obj,hacklib.obj, \
+	insight.obj,invent.obj
 HOBJ3 = light.obj,lock.obj,mail.obj,makemon.obj,mapglyph.obj,mcastu.obj, \
 	mhitm.obj,mhitu.obj,minion.obj,mklev.obj,mkmap.obj,mkmaze.obj, \
 	mkobj.obj,mkroom.obj,mon.obj,mondata.obj,monmove.obj
@@ -519,6 +521,7 @@ files.obj :	files.c $(HACK_H) $(INC)dlb.h $(INC)wintty.h #zlib.h
 fountain.obj :	fountain.c $(HACK_H)
 hack.obj :	hack.c $(HACK_H)
 hacklib.obj :	hacklib.c $(HACK_H)
+insight.obj :	insight.c $(HACK_H)
 invent.obj :	invent.c $(HACK_H)
 light.obj :	light.c $(HACK_H)
 lock.obj :	lock.c $(HACK_H)