Also remove several functions which never made it to a GIMP release.
They were really meant as temporary anyway from the start, waiting for
the new API to be usable.
And GimpParam is not boxed anymore. This is made useless by the fact it
is not an introspected type now.
Start copying all the actual wire communication to GimpPlugIn, and
move the legacy versions to gimplegacy.c.
This implies having the entire protocol code twice, but without any
if(PLUG_IN) { plug_in_stuff(); } else { legacy_stuff(); }
At the moment it is a wild mixture of old and new, but when finished
the wire code in gimplegacy.c will be entirely separate from the wire
code in GimpPlugIn, which will make it easy to g_assert() that only
one API is used by a plug-in.
which must be called by GIMP_EXTENSION procedures when they are ready
to run their temporary procedures. Move gimp_extension_ack() to
gimpobsolete.[ch].
Jehan