Remove $_SESSION usage, except install (#10745)

* Remove $_SESSION usage, except install
Fixes issue with device debug capture
Removes secure_cookies setting, use the .env variable SESSION_SECURE_COOKIE instead.  Reminder secure cookies requires cookies are transported over https, if everything is already transported via https, the setting won't make a difference.

* Fix availability map controls

app/Http/Controllers/Ajax/AvailabilityMapController.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * AvailabilityMapController.php
+ *
+ * -Description-
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2019 Tony Murray
+ * @author     Tony Murray <[email protected]>
+ */
+
+namespace App\Http\Controllers\Ajax;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+
+class AvailabilityMapController extends Controller
+{
+    public function setView(Request $request)
+    {
+        $this->validate($request, [
+            'map_view' => 'required|numeric|in:0,1,2'
+        ]);
+
+        return $this->setSessionValue($request, 'map_view');
+    }
+
+    public function setGroup(Request $request)
+    {
+        $this->validate($request, [
+            'group_view' => 'required|numeric'
+        ]);
+
+        return $this->setSessionValue($request, 'group_view');
+    }
+
+    /**
+     * @param \Illuminate\Http\Request $request
+     * @param string $key
+     * @return \Illuminate\Http\JsonResponse
+     */
+    private function setSessionValue($request, $key)
+    {
+        $value = $request->get($key);
+        $request->session()->put($key, $value);
+
+        return response()->json([$key, $value]);
+    }
+}