Use CLIENT_NAME_SIZE_FALLBACK also in jack_connect_ports to prevent
buffer overflows.

The old behavior of arbitrarily connecting to the first Jack client may
cause lockups on Pipewire systems. To prevent these, we now check
whether the 'system' client is actually present and auto-connect to it
in order to maintain backward compatibility with systems running Jack
proper. On Pipewire systems running the Pipewire Jack module that client
will not exist, in which case we just skip the auto-connection (you can
then use an audio patchbay like qjackctl to set up your default audio
device connections instead).

Backport from vanilla:
https://github.com/pure-data/pure-data/commit/a20fce3c

Backport from: https://github.com/pd-l2ork/pd-l2ork/commit/701e2d99

Color tags must now start with '=', e.g.: <=red>. The only other tags
recognized are b, h, i, s, and u, optionally preceded by '/' to indicate
an end tag. Escaping tags with an initial '!' works as before. Anything
else enclosed in <...> is taken as a literal.

Note that we want to be as specific as possible here, since help patches
also use <...> in comments as ad-hoc syntax for certain meta variables,
in which case we want them to be treated as literals. The revised tag
syntax should hopefully leave these alone now.

This fixes some fallout from the multi-channel backport in
rev. e745bc9c, by replacing some faulty code in clone_free with the
correct code from vanilla Pd.

Optimize the case of a plain array with equidistant x steps, doing the
xpix calculation with double precision floating point values. This
prevents x coordinate rounding issues with very large arrays with more
than 16777216 samples, which were previously only partially plotted due
to this problem.

Note that at present we only optimize the case of plain old array
objects, since these are most likely to contain copious amounts of
(sample) data. For arrays rendered as part of data structures the
rounding issues are still present in most cases, but won't usually be
noticed because these use cases rarely involve such humongous amounts of
data.

Fixed scaling issues due to rounding errors with large arrays, using
Ico's new glist_norm_x/y_per_scalar functions, originally from this
commit: https://github.com/pd-l2ork/pd-l2ork/commit/a492f9e0

Also performed some cleanup along the way, fixing up glist_ytopixels and
removing some commented dead code from scalar_vis.

This uses the transform matrix as is, as Jonathan originally implemented
it, reverting the extra padding Ico added for the different plot styles
in rev. e2e65133 to accommodate the custom scrollbars. Those changes
make it hard to debug array rendering issues, that's why I remove them
for now, but we might re-introduce them again later if needed.

Make sure to still call gui_end_array after an early loop exit in
polygon drawing.

See:
- https://github.com/pd-l2ork/pd-l2ork/commit/6dd2ca87
- https://github.com/pd-l2ork/pd-l2ork/commit/7b359c4b

This is the latest version (0.3.2) from
https://github.com/Lucarda/pd-flite, with some very minor touches to
make the source compile with the latest gcc versions.

Lucarda's flite is much newer than the one which comes with our moocow
version. It's also self-contained (CMU flite is included),
cross-platform (moocow/flite only works on Linux and requires 3rd party
libraries), and has useful additional functionality like multi-threading
support and the ability to load different voices.

This replaces the old testtone patch from the days of yore with
Alexandre's new version which looks less boring and also offers some
useful new functionality.

Fixed some typos and minor grammatical errors in the comments, while
also reducing the wall of text at the top, so that the patch (which is
substantially larger than the old one) requires a little less precious
screen real-estate. I think that removing some of the audio/MIDI
configuration hints there doesn't do much harm since that information is
also in the instructions subpatch, as well as being discussed at length
in the Pd manual and the "Meet the Cat" tutorial.

This reverts commit cde4f4f3.

Remove some legacy Tcl/Tk code. Also make sure that image_save doesn't
add the gop-spill flag unless it's really needed, in order to maintain
compatibility with vanilla ggee/image.

Make sure that fiddle~ et al are installed in their proper
subdirectories like on the other platforms, and that we don't overwrite
the PDDP docs in 5.reference with vanilla help patches of the same
name.