Fix old-http test when no server exists.

tests/test-static-http.out

@@ -1,26 +1,23 b''
-requesting all changes
-adding changesets
-adding manifests
-adding file changes
-added 0 changesets with 0 changes to 0 files
-0
+abort: error: Connection refused
+255
+ls: copy: No such file or directory
 changeset:   0:61c9426e69fe
 tag:         tip
 user:        test
 date:        Thu Jan  1 00:00:00 1970 +0000
 summary:     test
 
 requesting all changes
 adding changesets
 adding manifests
 adding file changes
 added 1 changesets with 1 changes to 1 files
 checking changesets
 checking manifests
 crosschecking files in changesets and manifests
 checking files
 1 files, 1 changesets, 1 total revisions
 foo
 pulling from old-http://localhost:20059/remote
 searching for changes
 no changes found