Thanks to David Wooldridge for all the testing.

This should fix problem if a user uses pam_csync and csync with different
urls (#27).

This extends the exclude function. Maybe we should do this for the local
too.

The wrong directory was used.

Thanks to Jim McDonough <jmcd@samba.org> for this.

Thanks to Joe Brockmeier <zonker@opensuse.org> for proofreading.

The directory version number is the soversion of the library.

This removes an uneeded syscall to lstat by mktemp at this point.