it's consistent and easy to debug/cleanup in this way.

shredder tests still use tmpdir() in utils.pl though as it's a bit complex.

Conflicts:
    t/api/link.t
        test counts
    t/web/ticket_links.t
        fix test count for new create_tickets tests on trunk

others use Links->Next, let's do that too. besides, Links->ItemsArrayRef includes deleted tickets, which need fix too

While the values are properly escaped, the keys are not.  Deal with
custom fields containing spaces, quotes, or backslashes by properly
escaping them and wrapping them in quotes.

When translating restrictions into clauses, whose values will be
surrounded by single quotes, escape both single quotes and backslashes.
Double quotes need never be escaped.  This affected calls to
$tickets->Limit whose VALUE contained backslashes; they previously might
have generated incorrect TicketSQL, and thus return no results.

Extensions may not always use t/ as their tests directory, if they want
to hide them from CPAN.  Thus, use $tmp{directory}, which has already
detected the proper directory name, to determine where to stash the
ports file.

It isn't always configured out of the box and the error is somewhat
unfriendly if you're not an Oracle DBA.

This fixes the search link for quicksearch queue name containing
backslashes, as well as a bug where repeatedly pressing "Add this term"
in the query builder would half the number of backslashes in each term's
value.