Add system update feature, git-ignore local configs, and fix homepage request logging

- Exclude config.json and admin.json in .gitignore so live settings/passwords are never overwritten by git
- Auto-generate config.json and admin.json with defaults if missing
- Add config.json.example and admin.json.example reference templates
- Add System Update page (/admin/update) in Admin Console to pull updates via Git with 1 click
- Log effective page name in index.php instead of literal 'auto'
- Add extra HAProxy/PFSense proxy headers to RequestLogger::getClientIp()

admin/src/AdminAuth.php

@@ -20,10 +20,35 @@ class AdminAuth
     private function loadAdminConfig(): array
     {
         $path = $this->config['admin_config'];
+        $examplePath = dirname($path) . '/admin.json.example';
+
         if (!file_exists($path)) {
-            return ['users' => [], 'security' => []];
+            if (file_exists($examplePath)) {
+                @copy($examplePath, $path);
+            } else {
+                $defaultAdminConfig = [
+                    'users' => [
+                        [
+                            'username' => 'admin',
+                            'password_hash' => password_hash('admin', PASSWORD_BCRYPT),
+                            'role' => 'admin',
+                            'created' => date('Y-m-d'),
+                        ]
+                    ],
+                    'security' => [
+                        'session_timeout' => 1800,
+                        'max_login_attempts' => 5,
+                        'lockout_duration' => 900,
+                    ]
+                ];
+                $dir = dirname($path);
+                if (!is_dir($dir)) {
+                    @mkdir($dir, 0755, true);
+                }
+                @file_put_contents($path, json_encode($defaultAdminConfig, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
+            }
         }
-        $data = json_decode(file_get_contents($path), true);
+        $data = file_exists($path) ? json_decode(file_get_contents($path), true) : null;
         return is_array($data) ? $data : ['users' => [], 'security' => []];
     }