templatize adblock tab content

templates/adblock/logging.php

@@ -0,0 +1,25 @@
+<!-- logging tab -->
+<div class="tab-pane fade" id="adblocklogfileoutput">
+  <h4 class="mt-3"><?php echo _("Blocklist log"); ?></h4>
+    <div class="row">
+      <div class="form-group col-md-8">
+        <?php
+        $log = '';
+        exec('sudo chmod o+r /tmp/dnsmasq.log');
+        $handle = fopen("/tmp/dnsmasq.log", "r");
+        if ($handle) {
+          while (($line = fgets($handle)) !== false) {
+            if (preg_match('/(0.0.0.0)/', $line)){
+              $log.=$line;
+            }
+          }
+        } else {
+          $log = "Unable to open log file";
+        }
+        fclose($handle);
+        echo '<textarea class="logoutput">'.htmlspecialchars($log, ENT_QUOTES).'</textarea>';
+        ?>
+    </div>
+  </div>
+</div><!-- /.tab-pane -->
+