Ensure that absolutized paths from hgrc do not contain ../ segments.
[ original upstream description ]
--- a/tests/test-keyword.out Fri Feb 01 08:16:56 2008 +0100
+++ b/tests/test-keyword.out Tue Jan 08 22:40:51 2008 -0500
@@ -293,7 +293,7 @@
added 1 changesets with 3 changes to 3 files
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
% incoming
-comparing with test-keyword/Test-a/../Test
+comparing with test-keyword/Test
searching for changes
changeset: 1:0729690beff6
tag: tip