Clearer warning when using unstable parts of API
Clearer warning when using unstable parts of API

stefwalter/libsecret,stefwalter/libsecret,stefwalter/libsecret,Distrotech/libsecret,Distrotech/libsecret,Distrotech/libsecret,GNOME/libsecret,stefwalter/libsecret,Distrotech/libsecret,GNOME/libsecret,GNOME/libsecret,GNOME/libsecret,stefwalter/libsecret,Distrotech/libsecret