prop_walk adds a leading / to all subdirectory paths. Unfortunately
this causes a problem when the remote repo lives in a subdirectory itself,
as the leading / causes subsequent PROPFIND calls to be executed on
the wrong path. Trimming the / before calling the PROPFIND fixes this problem.
Signed-off-by: Kevin Ballard <kevin@sb.org> Acked-by: Eric Wong <normalperson@yhbt.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>