Attempt to yield names in sorted order when walking. This is an improvement in behaviour, but the walk and changes code still has some flaws that make sorted name presentation difficult: - changes returns tuples of names, instead of a sorted list of (name, status) pairs. - walk yields deleted names after all others.

+ hg clone http://localhost:20059/ copy
requesting all changes
abort: error: Connection refused
255
ls: copy: No such file or directory
+ hg clone http://localhost:20059/foo copy2
requesting all changes
abort: HTTP Error 404: File not found
255