gitweb: using quotemeta

Commit ab41dfbfd4f3f9fedac71550027e9813b11abe3d introduces
the use of quotemeta to quote the $filename of the snapshot.
The commit message explains:

    Just in case filename contains end of line character.

But quotemeta quotes any characters not matching /A-Za-z_0-9/.
Which means that we get strings like this:
    
    linux\-2\.6\.git\-5c2d97cb31fb77981797fec46230ca005b865799\.tar\.gz

Is this the desired behavior?  FWIW, the backslash character
is not part of of the name, but ended up when the snapshot was written
to the filesystem.

Thanks,
   Luben