Empty templates are used to squash outgoing mail on a queue-by-queue
basis.

Explicitly load log_config if it is not compiled-in; some apache2
binaries (for example, OS X's) do not include it by default.

As only some types of debugging benefit from running as a single
process/thread, default to starting multiple, with the new --single
option (or -X, to mirror apache) to revert to the old behavior.

so extensions can change the headers before showing/localization

Request paths with double slashes will now correctly compare to the
already canonicalized menu paths.

The previous regex targeted a single failure case where the path is /
and the parent's path is / and then we tacked on a trailing /.

A more common case is the parent's path already containing a trailing
slash, leading to a double slash which wasn't canonicalized away.

as we match the request path by m{^/...} in the following code,
this canonizalization helps when user uses interesting urls
like //Ticket/Display.html

see #19723

Conflicts:
	bin/webmux.pl.in
	etc/RT_Config.pm.in
	lib/RT/Interface/Web.pm
	sbin/rt-email-dashboards.in
	t/mail/gnupg-incoming.t

Some initialdata files (including the test one I had lying around) rely
on the crazy code in CustomField->Create that defaults LookupType to
RT::Queue-RT::Ticket depending on other arguments.  The most common way
to trigger this is to say:
    Queue => 'General'
rather than
    Queue => ['General']
You should specify LookupType, but this gives a better error if you
forgot.

Otherwise when we interpolate undef (after disabling a group) we warn

The spurious exit removed in 9365ae59 meant that 7 more tests are now
running.

The spurious exit removed in 9365ae59 meant that 7 more tests are now
running.