Subject: [bug#38894] gnu: Add gssdp.

From: Danny Milosavljevic <[email-masked]>
Date: Sun, 12 Jan 2020 23:40:34 +0100

That file contains LGPL 2 (not GPL2).

Moreover, the important part is whether the source files contain a comment
header which specifies "or later" or not.

Please provide a license review of the source files that are the source of
files that are installed (only).