[RTTY] Dual decoding

[Bill Turner]

For those who do not have RiTTY by K6STI but who would like to run a
second program on a second computer for dual decoding, you might want
to give MMVARI a try. I ran it briefly when it first came out and
found a small but definite improvement over MMTTY in pulling the weak
ones out of the noise. 

If it had FSK transmit capability, I would probably use it in place of
MMTTY. 

Bill W6WRT