NetworkManager-pptp-1.2.12-bp160.1.13

- Add missing supplements(bsc#1220391):
  + NMA subpackage: Main package and gnome-control-center

- Rename gnome subpackage to NetworkManager-applet-pptp
  to more accurately reflect its usage
- Add missing supplements:
  - NM and pptp
  - NMA subpackage: Main package and NMA

- Update to version 1.2.12:
  + Dropped the libnm-glib support (obsolete since 2014).
  + Add support for building with upcoming pppd version (2.5.0).
  + Improvement to the build & test system.
  + Updated translations.

- Update to version 1.2.10:
  + libnm-glib compatibility (NetworkManager < 1.0) is disabled by
    default.
  + It can be enabled by passing --with-libnm-glib to configure
    script. Nobody should need it by now. Users that still use this
    are encourage to let us know before the libnm-glib support is
    removed for good.
  + The auth helper in external UI mode can now be run without a
    display server. This is useful when activating connections with
    "nmcli --ask".
  + Gtk4 version of the editor plugin is now available (for use
    with Control Center of GNOME 42 or later).
  + Updated translations.
- Add pkgconfig(gtk4) and pkgconfig(libnma-gtk4) BuildRequires and
  pass --with-gtk4=yes to configure, build the gtk4 version.
- Stop passing --without-libnm-glib to configure, no longer
  needed, nor recognized.
- Add optional libxml2-tools BuildRequires, build runs
  xml-stripblanks preprocessing if available.

- Set the path for the VPN service name file correctly to
  %_vpnservicedir (provided by macros.NetworkManager).

- No longer recommend -lang: supplements are in use