Enhanced Makefile to take into account changes in servers.txt

root/amery/Makefile

@@ -6,7 +6,7 @@ all: $(ZONES)
 clean:
 	@rm -f $(ZONES)
 
-../preprocessor.sed: ../preprocessor.sh $(wildcard ../*.in)
+../preprocessor.sed: ../preprocessor.sh $(wildcard ../*.in) ../servers.txt
 	@$^ > $@
 
 %.zone: %.zone.in ../preprocessor.sed