hgweb: do not audit URL path as working-directory path

Since hgweb is an interface to repository data, we don't need to prohibit
any paths conflicting within the filesystem. Still an access to working
files is audited by filectx.

mercurial/hgweb/webutil.py

@@ -320,7 +320,8 b' def branchentries(repo, stripecount, lim'
 
 def cleanpath(repo, path):
     path = path.lstrip('/')
-    return pathutil.canonpath(repo.root, '', path)
+    auditor = pathutil.pathauditor(repo.root, realfs=False)
+    return pathutil.canonpath(repo.root, '', path, auditor=auditor)
 
 def changectx(repo, req):
     changeid = "tip"

tests/test-hgwebdir.t

@@ -1231,14 +1231,15 b' Test subrepositories inside intermediate'
   
   f2
 
-Test accessing file that is shadowed by another repository
+Test accessing file that could be shadowed by another repository if the URL
+path were audited as a working-directory path:
 
   $ get-with-headers.py localhost:$HGPORT1 'rcoll/notrepo/f/file/tip/f3/file?style=raw'
-  403 Forbidden
-  
+  200 Script output follows
   
-  error: path 'f3/file' is inside nested repo 'f3'
-  [1]
+  f3/file
+
+Test accessing working-directory file that is shadowed by another repository
 
   $ get-with-headers.py localhost:$HGPORT1 'rcoll/notrepo/f/file/ffffffffffff/f3/file?style=raw'
   403 Forbidden