Suplementary patch for bug #7104 - "wide links" and "unix extensions" are incompatible.

Suplementary patch for bug #7104 - "wide links" and "unix extensions" are incompatible.

Bug reported by Ralf Zimmermann <r.zimmermann@siegnetz.de>. Reproduced by jra.

If the target directory of a share doesn't exist, but is designed to
be created by a "root preexec" script call, then the widelinks check
is done too early - thus preventing the user from connecting to the
share.

Fix is to re-arrange the order of checks in make_connection_snum()
to always do the following order of operations:

(1). Turn off wide links if unix extensions = yes.
(2). Call any root preexec scripts.
(3). Canonicalize the share path to remove any symlinks (ie. end
up with the realpath in the connection_struct).

Jeremy.