smbd: remove "fruit:posix_rename"

smbd: remove "fruit:posix_rename"

This option of the vfs_fruit VFS module that could be used to enable POSIX
directory rename behaviour for OS X clients has been removed as it could result
in severe problems for Windows clients.

As a possible workaround it is possible to prevent creation of .DS_Store files
(a Finder thingy to store directory view settings) on network mounts by running

  $ defaults write com.apple.desktopservices DSDontWriteNetworkStores true

on the Mac.

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>