* extfs.c, shared.c, tar.c: I changed semantics in my previous
patch - _get_path() now modifies strings passed to it. I thought
that I were carefull enough not to introduce bugs. You guessed it -
I was not. [Many tar_ and extfs_ functions modify strings passed
to them, but as they are only called from vfs layer, it does not
matter much.]
So I renamed function to alert everyone that semantics changed.
Fixed bugs in timestamping (and segfaults) when you entered tar
inside zip file or similar.
* vfs.c (mc_open): Die if the filesystem doesn't support open
