* push gnurl, gnutls and libmicrohttpd dependencies down to modules
* use standard UID/GID for gnunet (958/958)
* use GID adjecent (452) to dnsmasq (453) for gnunetdns to allow
using the owner match with a range of GIDs (452-452)
* package new gnunet-social pub/sub CLI tool
Signed-off-by: Daniel Golle <daniel@makrotopia.org>