canonicalize: fix // handling On Cygwin, and other platforms where // is detected as distinct from / at configure time, the canonicalize routines were incorrectly treating all instances of multiple leading slashes as //. See also coreutils bug http://debbugs.gnu.org/10472 * lib/canonicalize.c (canonicalize_filename_mode): Don't convert /// to //, since only // is special. Signed-off-by: Eric Blake <eblake@redhat.com>