Sub the new stable - supersede

- Update to version 2.34.0:
+ Fix another regression in JavaScriptCore on 32bit systems.

- Update to version 2.33.91:
+ Use the right display refresh monitor for animations in
accelerated compositng mode.
+ Fix several issues in JavaScriptCore on 32bit systems.
+ Prefer python3 over python2 in CMake.

- Update to version 2.33.90:
+ Show TLS protocol version and ciphersuite name in the
inspector when building with libsoup3.
+ Add multi-track support to media backend.
+ Avoid strong alias computations in font fallback code.
+ Fix deadlock tearing down pipeline when using fallback sink.
+ Fix the build with gtk-doc enabled.
+ Fix several crashes and rendering issues.
- Add fix-warnings.patch: silence return-type warnings.

- Add a 3rd flavor: gtk3 with libsoup2 (which retains compatibility
to the olderversions, identified as API version 4.0).

- Add _multibuild file and enable build of webkit2gtk4.

- Update to version 2.33.3:
+ Add support for display capture.
+ Add new API to access/modify capture devices states.
+ Add new API to configure the memory pressure handler.
+ Add support for client side certifiates authentication.
+ Add support color-schemes CSS property. (forwarded request 921030 from iznogood)