don't allow escapes in the hostname

Actually, an escape in the hostname was throwing off the parser.  I've
documented the issue and left it like this.  The alternative would be to write
an URI parser that supports escapes in hosts, which is probably not worth the
effort.

Author: Alexandru Scvortov

src/com/rabbitmq/client/ConnectionFactory.java

@@ -187,7 +187,7 @@ public void setVirtualHost(String virtualHost) {
      * Convenience method for setting the fields in an AMQP URI: host,
      * port, username, password and virtual host.  If any part of the
      * URI is ommited, the ConnectionFactory's corresponding variable
-     * is left unchanged.
+     * is left unchanged.  Escapes in the hostname are not permitted.
      * @param uriString is the AMQP URI containing the data
      */
     public void setUri(String uriString)

test/src/com/rabbitmq/client/test/AmqpUriTest.java

@@ -26,8 +26,8 @@ public void testUriParsing() throws URISyntaxException {
         /* From the spec */
         parseSuccess("amqp://user:pass@host:10000/vhost",
                      "user", "pass", "host", 10000, "vhost");
-        parseSuccess("amqp://user%61:%61pass@ho%61st:10000/v%2fhost",
-                     "usera", "apass", "hoast", 10000, "v/host");
+        parseSuccess("amqp://user%61:%61pass@host:10000/v%2fhost",
+                     "usera", "apass", "host", 10000, "v/host");
         parseSuccess("amqp://", "guest", "guest", "localhost", 5672, "/");
         parseSuccess("amqp://:@/", "", "", "localhost", 5672, "");
         parseSuccess("amqp://user@", "user", "guest", "localhost", 5672, "/");