transaction: really disable hardlink backups (issue4546)

mercurial/util.py

@@ -722,7 +722,7 b' def copyfile(src, dest, hardlink=False):'
         unlink(dest)
     # hardlinks are problematic on CIFS, quietly ignore this flag
     # until we find a way to work around it cleanly (issue4546)
-    if False or hardlink:
+    if False and hardlink:
         try:
             oslink(src, dest)
             return

tests/test-hardlinks.t

@@ -159,7 +159,7 b' Push to repo r1 should break up most har'
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   2 r2/.hg/store/data/f1.i
-  2 r2/.hg/store/fncache
+  1 r2/.hg/store/fncache
 
   $ hg -R r2 verify
   checking changesets
@@ -184,7 +184,7 b' Committing a change to f1 in r1 must bre'
   1 r2/.hg/store/00manifest.i
   1 r2/.hg/store/data/d1/f2.i
   1 r2/.hg/store/data/f1.i
-  2 r2/.hg/store/fncache
+  1 r2/.hg/store/fncache
 
 
   $ cd r3