Fix tftpd-hpa support

[Sascha Hauer]

Downloading files from a tftpd-hpa server is broken when the files
are in subdirectories since the introduction of links to directories
in a602bebc ('fs: Implement links to directories'). This series fixes
this.

Sascha

----------------------------------------------------------------
Sascha Hauer (2):
      fs: avoid pathes with '//' in __canonicalize_path()
      fs: Don't bother filesystems without link support with additional stat() calls

 fs/fs.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)