If there is no password, do not require MD5 and don't encrypt.

This works around an apparent bug in binkp where it doesn't appear to
initialize the BinkD compatible crypto correctly when using an empty
password.

exec/load/binkp.js

@@ -375,6 +375,8 @@ BinkP.prototype.connect = function(addr, password, auth_cb, port)
 
 	if (password === undefined)
 		password = '-';
+	if (password === '-')
+		this.require_md5 = false;
 	if (port === undefined)
 		port = 24554;
 
@@ -388,7 +390,8 @@ BinkP.prototype.connect = function(addr, password, auth_cb, port)
 	}
 
 	this.authenticated = undefined;
-	this.sendCmd(this.command.M_NUL, "OPT CRYPT");
+	if (password !== '-')
+		this.sendCmd(this.command.M_NUL, "OPT CRYPT");
 	this.sendCmd(this.command.M_NUL, "SYS "+this.system_name);
 	this.sendCmd(this.command.M_NUL, "ZYZ "+this.system_operator);
 	this.sendCmd(this.command.M_NUL, "LOC "+this.system_location);