[BUGFIX] Add more entropy to uniqid

uniqid() generates values based on current time,
subsequent calls may return the same value on a fast machine.

On Windows it's even worse, as uniqid()
has single-second-resolution out of the box.

Right now it is used in many places in the core,
also for creating temporary identifiers
for newly created records (in the datahandler).

The solution is to add a second parameter to
all calls (which adds more entropy).
see http://php.net/manual/en/function.uniqid.php

To make code consistent, this change adds the
 second parameter to all occurences of uniqid.

Resolves: #59701
Resolves: #58602
Resolves: #59055
Releases: master, 6.2
Change-Id: Id791556d45b4289d75411ff19ae050144fbfe51b
Reviewed-on: http://review.typo3.org/33328
Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>