httprepo: record the url after a request, makes pull + redirect works
POST+redirect doesn't work in python, as a workaround we record the url
from the previous GETs so that when we do a POST it uses the redirected url
fix issue327
% file replaced with directory
adding a
% should fail - would corrupt dirstate
abort: file named 'a' already in dirstate
% directory replaced with file
adding a/a
% should fail - would corrupt dirstate
abort: directory named 'a' already in dirstate
% directory replaced with file
adding b/c/d
% should fail - would corrupt dirstate
abort: directory named 'b' already in dirstate