Run intval on SFTP resource.

[michaeljoelphillips]

As of 5.6.28, it is necessary to execute intval on the SFTP Resource when parsing the URL.
See: http://paul-m-jones.com/archives/6439

Note: I have not tested this on PHP < 5.6.28, but I have tested and confirmed fixed for PHP 7.1.3.

[tszymanek]

$ pecl install -f ssh2-beta < .noninteractive

fails here for your php7 test; should be ssh2-1.0 imho

[halfer]

I think this duplicates #60.

[halfer]

@tszymanek: your pecl command would have to be done just for PHP7, as that breaks earlier version: https://travis-ci.org/Herzult/php-ssh/jobs/249354966