Release of probe firmware 4570

• Upgrade kernel on v3 probes without losing static network config
• Uniform interpretation of the size parameter of ping and traceroute: the size excludes the IPv4/IPv6 header and the transport (ICMP, TCP, UDP) header
• Add TCP mode to traceroute measurements
• Most measurements (except for DNS "use probe's local resolvers") now pick up a new list of resolvers if it has been updated by DHCP
• Support for SRV and NAPTR in DNS measurements
• Support "number of retries" option in DNS measurements
• Note that the use of the new measurement flag will be enabled in the UI and API at a later stage.