Add support to add domains/hostnames in wopi allow list.

[JMarcosHP]

Is your feature request related to a problem? Please describe.
Nextcloud setups with dynamic IP need to update the wopi allow list every time the public IP changes or need to execute external scripts to keep the list updated.

Describe the solution you'd like
Using domains that point to the current public IP with ddns services like cloudflare api, duck dns, etc. Can fix this issue.

Describe alternatives you've considered
Unset wopi allow list (not recommended).

Additional context
This

And this

[JL710]

I would love to get this!

And others seem too:

• https://help.nextcloud.com/t/nextcloud-office-wopi-allow-list-for-setups-with-dynamic-ip/160506
• https://github.com/HammyHavoc/nextcloud-wopi-allowlist-dynamic-ip-updater

I am not familiar with php and would not be able to add this by my self but I did a bit of research:
It appears that more or less the only thing that would need to be edited would be this function

richdocuments/lib/Middleware/WOPIMiddleware.php

Lines 94 to 108 in 7c834da

	public function isWOPIAllowed(): bool {
	$allowedRanges = $this->config->getAppValue(Application::APPNAME, 'wopi_allowlist');
	if ($allowedRanges === '') {
	return true;
	}
	$allowedRanges = preg_split('/(\s|,|;|\|)+/', $allowedRanges);
	$userIp = $this->request->getRemoteAddress();
	if (IpUtils::checkIp($userIp, $allowedRanges)) {
	return true;
	}
	$this->logger->warning('WOPI request denied from ' . $userIp . ' as it does not match the configured ranges: ' . implode(', ', $allowedRanges));
	return false;
	}