net-snmp: include ipv6 address & route mibs

[Npeca75]

Description: Since IPv6 is present in everyday use, we need to include information about IPv6 addresses & routes in SNMP

Example: IP-MIB::ipAddressOrigin.ipv6

IP-MIB::ipAddressOrigin[ipv6]["00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:01"] = manual IP-MIB::ipAddressOrigin[ipv6]["fd:00:00:09:02:55:00:00:00:00:00:00:00:00:01:01"] = manual IP-MIB::ipAddressOrigin[ipv6]["fe:80:00:00:00:00:00:00:0c:00:09:ff:fe:06:01:01"] = linklayer IP-MIB::ipAddressOrigin[ipv6]["fe:80:00:00:00:00:00:00:0c:02:09:ff:fe:00:01:01"] = linklayer IP-MIB::ipAddressOrigin[ipv6]["fe:80:00:00:00:00:00:00:ae:84:c6:ff:fe:25:8c:ce"] = linklayer

Tested: 23.05-snapshot master snapshot with LibreNMS, OpenWRT device IPv6 Addresses & Routes are properly recognized