* smbfs.c (new_dir_entry): New function with repeated code from
browsing_helper, loaddir_helper and server_browsing_helper.
(browsing_helper): Use new_dir_entry.
(loaddir_helper): Likewise.
(server_browsing_helper): Likewise.
(cached_lstat_info): Eliminated.
(smbfs_readdir): Make dirent_dest static const.
Eliminate cached_lstat_info.
(smbfs_open_link): Make user parameter const. Fix memory leak.
(fake_server_stat): Make path parameter const. Symplify.
(smbfs_fstat): Set my_errno to EFAULT before return.