Update Meinberg Lantime MIB

Meinberg provides two MIBs with their Lantime reference clocks:

MBG-SNMP-ROOT-MIB.mib

MBG-LANTIME-NG-MIB.mib

Observium CE 22.12.12447 appears to have integration for the first, under the name MBG-SNMP-LTNG-MIB

However, while basic information (temperature, serial, OS, interfaces) is being shown correctly in the web interface, information on the more relevant functions of this device is missing. (like Sync status, Sync offset, GPS status, long wave field strength etc..).

This might be due to an old version of the MIB being used?

Attached you can find the most recent versions of the MIBs.