core: Add a missing G_GNUC_PURE attribute to gdata_service_get_proxy_resolver()
core: Add a GDataClientLoginAuthorizer:proxy-resolver property

Bound to SoupSession’s ‘proxy-resolver’ property. Based on commit
8f1923fcd9c4203f68ce6a0405526500a77783e5 by Matthew Barnes <mbarnes@redhat.com>.

This deprecates the following API:
 • GDataClientLoginAuthorizer:proxy-uri
 • gdata_client_login_authorizer_[get|set]_proxy_uri()
and adds the following new API:
 • GDataClientLoginAuthorizer:proxy-resolver
 • gdata_client_login_authorizer_[get|set]_proxy_resolver()

Helps: https://bugzilla.gnome.org/show_bug.cgi?id=709758
core: Add a GDataOAuth1Authorizer:proxy-resolver property

Bound to SoupSession’s ‘proxy-resolver’ property. Based on commit
8f1923fcd9c4203f68ce6a0405526500a77783e5 by Matthew Barnes <mbarnes@redhat.com>.

This deprecates the following API:
 • GDataOAuth1Authorizer:proxy-uri
 • gdata_oauth1_authorizer_[get|set]_proxy_uri()
and adds the following new API:
 • GDataOAuth1Authorizer:proxy-resolver
 • gdata_oauth1_authorizer_[get|set]_proxy_resolver()

Closes: https://bugzilla.gnome.org/show_bug.cgi?id=709758