conntrack-tools: switch to git

conntrack-tools: switch to git

There have been a number of interesting fixes in conntrack-tools since
the current latest release. Most notable is that this fixes IPv6
conntrack table syncing when cross-compiling conntrack-tools.

7e7748d src/main: refresh help message
fe32043 conntrackd.8: refresh file
47a4dda conntrackd.8: add reference to systemd
0cfe7ff doc/manual: include some bits about init systems
74a418b conntrackd: cthelper: ftp: Set match offset/len for PORT mangling
d833bed conntrackd: cthelper: ftp: Fix debug print
dd4b5a1 conntrackd: cthelper: Add new mdns helper
498d698 Link nfct and helper modules with `-z lazy`
9e94e85 sync-mode: print errno message on failure
ab81c35 log: print messages to stdout/sderr if running in console mode
631d92b log: introduce a mechanism to know if log was initialized
ccb1c8b conntrackd: replace error reporting in the config parser with dlog()
bee121e conntrackd: replace fprintf calls with dlog()
5a51b04 conntrack-tools: update Arturo Borrero Gonzalez email address
abb9984 helper: remove copy and paste from uapi kernel header
a91a004 src: add log message when resync is requested by other node
c2d8be1 systemd: fix missing log.h include
f6ca216 config: drop old/obsolete/deprecated conntrackd.conf config options
8b83771 conntrack: send mark filter to kernel iff set
1ba5e76 conntrackd: cthelper: Don't leak nat_tuple
832166d conntrackd: cthelper: Free pktb after use
ff843bc conntrackd: config: Do not strdup() tokens
b61c454 conntrackd: cthelper: ssdp: Track UPnP eventing
8ea394e conntrackd: Remove obsolete rule to catch ambiguous Checksum option
39398cd conntrackd: CommitTimeout breaks DisableExternalCache set On
29b390a conntrack: Support IPv6 NAT
381827a conntrackd: factorice tx_queue functions
131df89 conntrackd: factorize resync operations
d31bacc conntrackd: consolidate more code to use resync_send()
3d98496 conntrackd: request resync at startup
ef410bf conntrackd: remove use of HAVE_INET_PTON_IPV6
9d38445 conntrackd: evaluate configuration earlier
6feded7 conntrackd: cleanup if failed forking
dbfdea7 conntrackd: deprecate unix backlog configuration
210f542 conntrackd: make the daemon run in RT mode by default
37cc7f0 conntrackd: remove warning for -S
d2849d1 conntrack: Show multiple CPUs stats from proc
bc0b49a conntrackd: cthelper: ssdp: fix build with musl
0c77a25 tests: don't fail on modprobe since the driver might be built-in
eefe649 conntrack.8: refresh manpage

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>