MikroTik RouterOS Firmware 6.22 RC 4

Fixes:

- sntp - fix problems with dns name resolving failures that were triggering system watchdog timeout;
- improved connection-state matcher in firewall - can match multiple states in one rule, supports negation;
- added connection-nat-state matcher - can match connections that are srcnatted,dstnatted or both;

eoip/eoipv6/gre/gre6/ipip/ipipv6/6to4 tunnels have new features:

- tunnels go down when no route to destination;
- tunnels go down for 1 minute when transmit loop detected, warning gets logged;
- new keepalive-retries setting;
- keepalives enabled by default for new tunnels (10sec interval, 10 retries);

The package includes all the files for the following architectures:

- mipsbe
- mipsle
- ppc
- tile
- x86