Need to include deflate.h in EXTRA_DIST so that it gets included in
the tarball. I don't know whether we actually need it in INTGGSOURCES,
but there are other header files listed there so it seems unlikely to
cause harm.
/** @page gtkblist-signals GtkBlist Signals
@signals
@signal gtkblist-hiding
@signal gtkblist-unhiding
@signal gtkblist-created
@signal drawing-tooltip
@signal drawing-buddy
@endsignals
@see gtkblist.h
<hr>
@signaldef gtkblist-hiding
@signalproto
void (*gtkblist-hiding)(PurpleBuddyList *blist);
@endsignalproto
@signaldesc
Emitted when the buddy list is about to be hidden.