Vale-sail

Results 4 issues of Vale-sail

![image](https://user-images.githubusercontent.com/12558433/60328702-66909500-99c1-11e9-9755-aa98e2199bde.png) key 里面的 分号未进行转义 可能会导致配置失败

I want to connect oracle with a ssh proxy,if you i can custom dial with session.context.connOption,The problem is easy to solve

when i use ziutek/telnet connect a telnet server on centos 7。if server send data mark(242),conn.read() get will unknown command error