Merge branch '6301-delete-ssl-cert-symlinks-in-website-ssl-folder-when-acme-sh-is-used' into 'develop'

Resolve "Delete SSL cert symlinks in website ssl folder when acme.sh is used"

Closes #6301

See merge request ispconfig/ispconfig3!1578

Author: Marius Burkard

server/lib/classes/letsencrypt.inc.php

@@ -415,6 +415,10 @@ public function request_certificates($data, $server_type = 'apache') {
 		if($use_acme) {
 			$letsencrypt_cmd = $this->get_acme_command($temp_domains, $key_file, $bundle_file, $crt_file, $server_type);
 			$allow_return_codes = array(2);
+			// Cleanup ssl cert symlinks, if exists
+			if(@is_link($key_file)) unlink($key_file);
+			if(@is_link($bundle_file)) unlink($bundle_file);
+			if(@is_link($crt_file)) unlink($crt_file);
 		} else {
 			$letsencrypt_cmd = $this->get_certbot_command($temp_domains);
 			umask($old_umask);