setUri() invalidates relative URI when setting default ports

[antiphp]

Hi,

when setting a relative URI /example the Zend\Http\Client::setUri() method adds a default port and so invalidates the URI resulting in isValidRelative() returning FALSE instead of TRUE.

<?php
require './vendor/autoload.php';
$relativeUri = '/example';
$client = new Zend\Http\Client($relativeUri);
$uri = new Zend\Uri\Http($relativeUri);
var_dump($client->getUri()->isValidRelative(), $uri->isValidRelative());

Expected output

boolean(true)
boolean(true)

Actual output

boolean(false)
boolean(true)

I don't know how to build a patch, but line 323 of Client.php should be
if (! $this->getUri()->getPort() && $this->getUri()->isAbsolute()) {
instead of
if (! $this->getUri()->getPort()) {

Cheers

[samsonasik]

@antiphp I've created PR #149 for it