SPINEL_PROP_THREAD_ON_MESH_NETS value

On-Mesh Prefixes Format: `A(t(6CbCbSC))` Data per item is: `6`: IPv6 Prefix `C`: Prefix length in bits `b`: Stable flag `C`: TLV flags (SPINEL_NET_FLAG_* definition) `b`: "Is defined locally" flag. Set if this network was locally defined. Assumed to be true for set, insert and replace. Clear if the on mesh network was defined by another node. This field is ignored for INSERT and REMOVE commands. `S`: The RLOC16 of the device that registered this on-mesh prefix entry. This value is not used and ignored when adding an on-mesh prefix. This field is ignored for INSERT and REMOVE commands. `C`: TLV flags extended (additional field for Thread 1.2 features).