Simplify call_trans2qfilepathinfo() and smbd_do_qfilepathinfo()

Simplify call_trans2qfilepathinfo() and smbd_do_qfilepathinfo()

Remove the bool ms_dfs_link parameter from smbd_do_qfilepathinfo.
It is not possible for this to be a DFS link. Remove the check_msdfs_link()
call from call_trans2qfilepathinfo() - the call to filename_convert()
above with a ucf_flags of zero *MUST* catch a DFS link and return
NT_STATUS_PATH_NOT_COVERED in this case, so the code below checking
for msdfs links is redundent. Don't add this to 3.5.x, as it's an
optimization but not needed to fix bug #7339 - MSDFS is non-functional in 3.5.x.

Jeremy.