Disable server records before probe to avoid zombies

- Also disable exact match records to avoid http/https double record issues
- Address #105

src/classes/Models/Server.php

@@ -57,4 +57,13 @@ class Server extends \Friendica\Directory\Model
 
 		return null;
 	}
+
+    public function getByBaseUrl(string $polled_url): ?array
+    {
+        $polled_url = trim($polled_url, '/');
+
+        return $this->atlas->fetchOne('SELECT s.* FROM `server` s WHERE s.`base_url` = :base_url',
+            ['base_url' => $polled_url]
+        );
+    }
 }

src/classes/Pollers/Server.php

@@ -78,7 +78,16 @@ class Server
 			return 0;
 		}
 
+        // Disabling exact match first
+        if ($server = $this->serverModel->getByBaseUrl($polled_url)) {
+            $this->atlas->perform('UPDATE `server` SET `available` = 0 WHERE `id` = :server_id', ['server_id' => $server['id']]);
+        }
+
+        // Disabling before probe to avoid zombie records
         $server = $this->serverModel->getByUrlAlias($polled_url);
+        if ($server) {
+            $this->atlas->perform('UPDATE `server` SET `available` = 0 WHERE `id` = :server_id', ['server_id' => $server['id']]);
+        }
 
         if (
 			$server
@@ -89,10 +98,6 @@ class Server
 			return $server['id'];
 		}
 
-		if ($server) {
-			$this->atlas->perform('UPDATE `server` SET `available` = 0 WHERE `id` = :server_id', ['server_id' => $server['id']]);
-		}
-
 		$probe_result = $this->getProbeResult($polled_url);
 
 		$parse_success = !empty($probe_result['data']['url']);