[gssdp] Created tag gssdp-1.2.3

[Jens Georg <jensgeorg src gnome org>]

The signed tag 'gssdp-1.2.3' was created.

Tagger: Jens Georg <mail jensge org>
Date: 1592862592 +0200

    Release GSSDP 1.2.3

Changes since the last tag 'gssdp-1.2.2':

Jens Georg (7):
      Post-release version bump
      client: Prevent crash if not initialized
      net: Fix critical if device does not exist
      socket-source: ::1 Should not set mcast interface
      client: Add getter for mask
      client: Add missing prototype for get_address_mask
      Prepare 1.2.3