1.2.1: adds data types to TR-69 measurements and adds more IPv6 information
Features:
- adds 'ipv6_prefix' and 'ipv6_prefix_length' to system dashboard #91
- adds logging of blocktime for failed Lua connection logins #89
- permits connection to InfluxDB 1 without user and password #88
Bugfixes:
- specifies data type for all TR-69 measurements #87
Special thanks to @flok for the two pull requests.