Lortie: Gtk 4.0 is not Gtk 4

Allison Lortie writesabout a new proposed GTK release scheme that may take some getting usedto."Meanwhile, Gtk 4.0 will not be the final stable API of what we wouldcall 'Gtk 4'. Each 6 months, the new release (Gtk 4.2, Gtk 4.4, Gtk 4.6)will break API and ABI vs. the release that came before it. Theseincompatible minor versions will not be fully parallel installable; theywill use the same pkg-config name and the same header file directory. Wewill, of course, bump the soname with each new incompatible release - youwill be able to run Gtk 4.0 apps alongside Gtk 4.2 and 4.4 apps, but youwon't be able to build them on the same system. This policy fits the modelof how most distributions think about libraries and their 'developmentpackages'." Only the last release in each major number series(expected every two years) would have a stable API. Read the whole thingto fully understand what is being proposed.