netsniff-ng 0.5.9-rc1

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
flowtop: Include netlink dissector to fix build temporarily

flowtop links in the dissector modules just for the TC/UDP port lookup
feature. Since dissector.h now includes libnl headers, we also need to
include the libnl CFLAGS for flowtop build and thus also make it depend
on libnl.

The real fix for this in the future would be to extract the port lookup
from dissector_eth.c and the just link in this module into flowtop
instead of the entire dissector stuff.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
build: Mention the download mirrors in the release announcement

Add mirror.distanz.ch and the source release on github to the download
URLs in the release announcement.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
lookup: Move UDP/TCP port and Ethernet type lookup into own module

Up to now, the lookup of TCP/UDP port names and Ethernet types was
tightly integrated with the dissector infrastructure, since it is its
main user. However, flowtop also makes use of the name lookup
functionality without needing the actual dissector infrastructure. Thus,
the basic dissector infrastructure also needs to be linked into flowtop
without actually being used.

Fix this by extracting the port/ethertype lookup into an own module
which can then be used either directly (for flowtop) or as part of the
dissector infrastructure (for netsniff-ng).

This also reverts the quick & dirty fix introduced in commit f3322c6
("flowtop: Include netlink dissector to fix build temporarily").

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Merge remote-tracking branch 'upstream/master'