Change apply_default_perms() to not take an fsp.

Change apply_default_perms() to not take an fsp.

This is a first change in a series: Pass what is needed instead of files_struct
pointers to some functions. This is in preparation of introducing two variants
of get_nt_acl - one for fname (which does not need an fsp), one for file
descriptor.

This changes apply_default_perms to take share_params (rather thatn snum)
and an is_directory flag instead of an fsp.

Michael