Update mkpasswd to be slightly more secure

Try to ensure that the mkpasswd command run in ssh sessions only echos to
ssh client running that command. This gives us slightly more security
against other session users seeing the hashed password.

Fixed console sending with some of the APIs

Updated version to 1.3.7 to match for next spigot + bungeecord release.

src/main/resources/plugin.yml

@@ -1,6 +1,6 @@
 name: SSHD
 version: ${project.version}
-author: Ryan Michela, Haarolean, toxuin, Justin Crawford
+author: Ryan Michela, Haarolean, toxuin, Justin Crawford, Zachery Coleman
 main: com.ryanmichela.sshd.SshdPlugin
 load: STARTUP
 commands: