Parsed and unparsed uri is not a same

[weierophinney]

Example:
$source_uri = '/?#';
$parsed_uri = Zend\Uri\UriFactory::factory($source_uri, 'http');
$unparsed_uri = $parsed_uri->toString();
echo $unparsed_uri; // we see '/', but must be same as source uri

It's because in Zend\Uri::toString() only host check on null. Can you fix it, please, and add check on null with other uri components? It will be more right behavior of this method.

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Originally posted by @RubtsovAV at zendframework/zend-uri#5

[weierophinney]

The query string and anchor are empty so there is no reason to put the '?' and '#' characters in the $unparsed_uri

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Originally posted by @brian978 at zendframework/zend-uri#5 (comment)

[samsonasik]

I agree with @brian978 , it doesn't make sense to parse empty query and fragment. Handle that will make a lot of edge case bug.