getpass: Don't fail if stdin is not a tty.
getpass: Don't fail if stdin is not a tty.

We don't need to manipulate the tty state (such as turning off echo)
when prompting for passwords if we're not reading from a tty.

robxu9/libssh,taikoo/libssh,jt1/honeypot-libssh,nviennot/libssh,mwgoldsmith/ssh,sebadoom/libssh,kedazo/libssh,mwgoldsmith/libssh,Distrotech/libssh,wangshawn/libssh,kedazo/libssh,robxu9/libssh,sebadoom/libssh,elastichosts/libssh,taikoo/libssh,wangshawn/libssh,wangshawn/libssh,DouglasHeriot/libssh,bigcat26/libssh-mod,mwgoldsmith/ssh,mwgoldsmith/ssh,taikoo/libssh,bigcat26/libssh-mod,robxu9/libssh,Distrotech/libssh,Distrotech/libssh,DouglasHeriot/libssh,Distrotech/libssh,sebadoom/libssh,sebadoom/libssh,elastichosts/libssh,pouete/libssh,pouete/libssh,bigcat26/libssh-mod,nviennot/libssh,kedazo/libssh,wangshawn/libssh,jt1/honeypot-libssh,mwgoldsmith/libssh,nviennot/libssh,mwgoldsmith/libssh,jt1/honeypot-libssh,kedazo/libssh,mwgoldsmith/ssh,DouglasHeriot/libssh,pouete/libssh,taikoo/libssh,DouglasHeriot/libssh,pouete/libssh,jt1/honeypot-libssh,robxu9/libssh,mwgoldsmith/libssh,bigcat26/libssh-mod,nviennot/libssh,elastichosts/libssh