Do not overwrite 'login' prompt in ssh plugin
Do not overwrite 'login' prompt in ssh plugin

ssh plugin was sending backspaces without bound, causing
deletion of the login prompt.

xcat2/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,whowutwut/confluent,whowutwut/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent