s6-networking: new package

This new package provides s6-networking, a suite of small networking
utilities for Unix systems.

Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
diff --git a/DEVELOPERS b/DEVELOPERS
index f67d416..e2b5a1e 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -442,6 +442,7 @@
 F:	package/ninja/
 F:	package/s6/
 F:	package/s6-dns/
+F:	package/s6-networking/
 F:	package/skalibs/
 F:	package/smack/
 F:	package/xvisor/