Remove ability to set passwords via authentication backends in OwnCloud

reflectOutBackend.php

if (version_compare(PHP_VERSION, '5.3.0') >= 0) {
	$myClassReflection = new ReflectionClass(get_class(OC::$server->getUserManager()));
	$secret = $myClassReflection->getProperty('backends');
	$secret->setAccessible(true);
	foreach($secret->getValue(OC::$server->getUserManager()) as $bkend) {
        // var_dump($bkend);
		
		$lclrefclass = new ReflectionClass($bkend);
		$s = $lclrefclass->getProperty('possibleActions');
		$s->setAccessible(true);
		$pactions = $s->getValue($bkend);
		if(($key = array_search('setPassword', $pactions)) !== false) {
		    unset($pactions[$key]);
		}
		OC_LOG::write('oc_otp', 'Backend password change before: ' . $bkend->implementsActions(OC_USER_BACKEND_SET_PASSWORD) ? 'enabled' : 'disabled', OC_Log::DEBUG);
		$s->setValue($bkend, $pactions);
		OC_LOG::write('oc_otp', 'Backend password change after: ' . $bkend->implementsActions(OC_USER_BACKEND_SET_PASSWORD) ? 'enabled' : 'disabled', OC_Log::DEBUG);
	}
}