v1.16

Split detection switched to payload[27] == 1 — the long-validated indicator used by K7MDL's IC905_Ethernet_Decoder. A direct, band-independent flag — no frequency comparison, no derivation. With the existing decode (byte 184 = primary/displayed VFO, byte 196 = secondary), the rule is: split ON -> transmit VFO = secondary (byte 196); otherwise -> primary (byte 184).

Resolves the v1.15 known issue: with both VFOs on the same band + split, the TX frequency is now correctly the secondary VFO's frequency (verified on-air — same-band 23cm split key fires the right relays and reports the secondary's freq, not the primary's).

Credit: K7MDL for the byte-27 split flag and the matching VFO offsets (selected/unselected at 184/196).