r7512: Fix net share migrate files to also migrate the ACLs of the top level

r7512: Fix net share migrate files to also migrate the ACLs of the top level
dir of a share.  Till now we excluded '.' and '..' in general.  For the
fix the information about top or lower level dir is stored in the
copy_clistate.  src and dst share are now also part of this struct and
we only pass a pointer to the struct to the functions.

This bug was found by Bill Calero of Novell.  Thanks Bill!

With this checkin no new functionality was added.  But the copy_clistate
already knows about a mode. Later beside the migrate an additional
report mode will be added.

This changes are coordinated with Günther <gd>.

Lars
(This used to be commit 506aaefa3716c7683eef9afe0d1bb5b6e2533c4b)