Wrong length for 64-bit integer using protobuf

[MagicalTux]

All across the documentation, 64-bit integer using protobuf varint are mentioned with type written as:

From 1 byte (included) to 9 bytes (included)

This would be the case for up to 63 bits, however storing an extra 64th bit as protobuf varint (values 1 << 63 and above) would require one extra byte, so this should be corrected as:

From 1 byte (included) to 10 bytes (included)