* Reparations and recommendations for the dev/IPv6_integration branch
* Applied uncrustify
* More changes after testing ARP, ICMP4, ICMP6, UDPv4 and UDPv6, DNSv6
* A few changes to DNS after testing it
- Add IPv6 changes to FreeRTOS_IP_Timer FreeRTOS_IP_Utils
- Add FreeRTOS_DHCPv6.h
- Update generateChecksum.
- MISRA: Fix rule 1.1, 8.13, 8.5, 20.9 and Suppress rule 8.9, 11.3
- Limit the use of ipconfigUSE_IPV6
- Run uncrustify and update the files