Add netmiko cmd_verify disable option

Hello

If this project still developing could you please add netmiko option cmd_verify. 
I have issue when I need to enter command which hide under ***** in console. For example in brocade command `unhide foscmd` then enter password, but that password types as ***** in console.
I modified netmiko scr to pass my command for now, but I want to avoid it int further 

Thanks 