https://github.com/Hamlib/Hamlib/issues/259
set_vfo_opt can now dynamically change vfo mode on rigctld
So this example now works...does some non-vfo stuff then switches to vfo mode
rigctl -m 2 F 14074000 V VFOB F 14076000 V VFOA f V VFOB f set_vfo_opt 1 f VFOA
rigctl commands v,V and S have been changed to not require VFO arguments
New API function rig_set_vfo_opt -- only implemented for Net rigctl as it doesn't apply to any other rigs