X-ON / X-OFF support?

[lni]

Thanks for this great project!

Just a quick question, is there X-ON / X-OFF software flow control support in this package? Couldn't find much info on that after search. Thanks.

[antare74]

Likewise, after I searched through several sources and read the existing code, I still couldn't find the configuration for flow control. Considering the case, there are still open issues regarding the same matter #54

[ponkin]

+1 one for flow control