Some small changes in preparation for hscan

This patch does some small changes:
  - fixes a comment
  - export more node functions (unneeded now, but hscan will use them)
  - fixes Makefile rule for building the programs

Ganeti/HTools/Cluster.hs

@@ -754,7 +754,7 @@ loadData ndata idata =
         (ktn, nl) = loadTabular ndata
                     (\ (i:jt:jf:kt:kf:[]) -> (i, Node.create jt jf kt kf))
                     Node.setIdx
-    {- instance file: name mem disk -}
+    {- instance file: name mem disk pnode snode -}
         (kti, il) = loadTabular idata
                     (\ (i:j:k:l:m:[]) -> (i,
                                            Instance.create j k

Ganeti/HTools/Node.hs

@@ -6,8 +6,8 @@
 
 module Ganeti.HTools.Node
     (
-      Node(failN1, idx, f_mem, f_dsk, p_mem, p_dsk, slist, plist,
-           p_rem, offline)
+      Node(failN1, idx, t_mem, f_mem, t_dsk, f_dsk, p_mem, p_dsk, p_rem,
+           plist, slist, offline)
     -- * Constructor
     , create
     -- ** Finalization after data loading

Makefile

@@ -8,7 +8,7 @@ DOCS = README.html NEWS.html
 
 all: $(HPROGS)
 
-hn1 hbal: % : %.hs Ganeti/HTools/Version.hs $(HSRCS) Makefile
+$(HPROGS): %: %.hs Ganeti/HTools/Version.hs $(HSRCS) Makefile
 	ghc --make -O2 -W $@
 
 $(DOCS) : %.html : %