Expose additional emails in {DAV:}alternate-URI-set

[tcitworld]

This allows iMip invitations to be send with an alternative email as "Reply-To" field.

The emails are provided in the alternate-URI-set prop, and through calendar-user-address-set and email-address-set on a CalDAV principal.

https://github.com/nextcloud/3rdparty/blob/41d5f9752c7e0f2b690480a38ef5b9dddc357166/sabre/dav/lib/CalDAV/Plugin.php#L347-L367

However, it's not possible to find users principals from their alternative emails by filtering through {http://sabredav.org/ns}email-address or calendar-user-address-set (which only use the system email address).

server/apps/dav/lib/Connector/Sabre/Principal.php

Lines 299 to 311 in 9c2db7f

	case '{http://sabredav.org/ns}email-address':
	if (!$allowEnumeration) {
	if ($allowEnumerationFullMatch) {
	$users = $this->userManager->getByEmail($value);
	} else {
	$users = [];
	}
	} else {
	$users = $this->userManager->getByEmail($value);
	$users = \array_filter($users, function (IUser $user) use ($currentUser, $value, $limitEnumerationPhone, $limitEnumerationGroup, $allowEnumerationFullMatch, $currentUserGroups) {
	if ($allowEnumerationFullMatch && $user->getSystemEMailAddress() === $value) {
	return true;
	}

Closes #27201

[tcitworld]

Can someone restart Drone?

[Pytal]

Can someone restart Drone?

Could try a no-edit force push?

git commit --amend --no-edit
git push --force

[ChristophWurst]

🚀

[PVince81]

👍