Add compatibility for TYPO3 9

[flossels]

No description provided.

[liayn]

Did you test this?
extPath returns an absolute path, so that will most probably not work out

[liayn]

ExtensionManagementUtility::siteRelPath('openid') will return typo3conf/ext/openid/lib/php-openid

ehm what? what's going on here?

[dmitryd]

Append after line 524 to get the same as from siteRelPath:

$extPath = substr($extPath, strlen(Environment::getPublicPath() . '/'));

[flossels]

yeah, I have tested that.
ExtensionManagementUtility::siteRelPath('openid') will return typo3conf/ext/openid/lib/php-openid wich is the same result as substr(PathUtility::getAbsoluteWebPath(ExtensionManagementUtility::extPath('openid') . 'lib/php-openid'),1); both does not work.

[dmitryd]

Currently I need this ext for our 9.5.0 project, so I am updating it. I will make it compatible with both 8.7.x and 9.5.0 and will make a PR.

[liayn]

Integrated in #23