rename: simplify forced renaming
This should help work around virus scanner issues with rename on Windows.
adding a
adding b
adding c
adding d
adding dir/bar/foo
adding dir/x
adding dir/y
adding e
% inserve
? hg.pid
% clean
C a
C b
C c
C d
C dir/bar/foo
C dir/x
C dir/y
C e
% all
? hg.pid
C a
C b
C c
C d
C dir/bar/foo
C dir/x
C dir/y
C e
% path patterns
M dir/x
? hg.pid
M dir/x
M x