package/s6-networking: bump to v2.5.1.1

Summary of changes:

 - skalibs dependency bumped to 2.12.0.0
 - s6-dns dependency bumped to 2.3.5.4
 - skalibs dependency bumped to 2.11.1.0
 - execline optional dependency bumped to 2.8.2.0
 - s6 dependency bumped to 2.11.0.1
 - The obsolete minidentd program has been removed.
 - LibreSSL optional dependency bumped to 3.3.4
 - LibreTLS optional dependency bumped to 3.3.4
 - Client certificates are now properly supported in s6-tlsd-io.

License hash updated due to copyright year change.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>