Make go-pear.php work in a non-interactive mode

[michael-o]

I recently reported to the FreeBSD ports system to install pear via go-pear.phar instead of an old version of go-pear. Unfortunately, the go-pear.phar is an interactive script which cannot be controlled from outside with a non-interactive mode.

Please add a non-interactive mode to ease maintainer needs.

[LarsFronius]

Isn't that what install-pear-nozlib.phar is trying to be?