- Generate libpxbackend-1_0-mini to be used inside OBS: the backend
is built without additional dependencies like cURL. So there is
no wpad/pac support in this variant. Helps break a build cycle.

- Update to version 0.5.3:
+ Fix crash querying URLs without a host.
+ Web: Update application page.
+ Add appplication info about apt and python requests.

- Update to version 0.5.2:
+ Link with libsocket where needed.
+ Remove libsoup from doc and CI.
+ Fix coverity findings.
+ Add a comment that docs option needs introspection.
+ Set pac data after download only.
+ Fix race condition in px_manager_get_proxies_sync.
+ Update gobject dependency in pkgconfig file.
+ Reread env variables in each get_config call.

- Drop pkgconfig(libpeas-1.0) BuildRequires: libpeas is no longer
needed.
- Add pkgconfig(gobject-introspection-1.0) BuildRequires: this was
used before, but pulled in by libpeas.

For RelEng: this needs prjconf changes

Prefer: -libpxbackend-1_0
Ignore: libpxbackend-1_0-mini:this-is-only-for-build-envs