Re: Enhance ptyfs to handle multiple instances.

[Ilya Zykov]

> 
> if the first mount can only have [0..n-1] the second [n...2*n] etc...
> 

"165:0 165:1" is ptm[x] first instance devices. "165:2 165:3" is ptm[x] second 
instance devices ...
Every instance can have [0..N] pts devices.

Ilya.