Check for invalid line thing...

Implicated in possible infinite loop/OOM problems.

exec/imapservice.js

@@ -707,6 +707,8 @@ function parse_command(line)
 		{
 			var ret='';
 
+			if (line.search(/^{([0-9]+)}$/) !== 0)
+				throw new Error('invalid line, aborting');
 			line=line.replace(/^{([0-9]+)}$/, "$1");
 			client.socket.send("+ Give me more of that good stuff\r\n");
 			var len = parseInt(line);