chatgui: add Status page in settings (NTP + connections status)

src/config_parser.h

@@ -92,6 +92,11 @@ struct CFG_ALLOWED_KEY {
     struct CFG_ALLOWED_KEY *next;
 };
 
+struct CFG_NTP_SERVER {
+    char name[256];
+    struct CFG_NTP_SERVER *next;
+};
+
 #define MAX_TCP_PROXY_CLIENT_MAPPINGS 32
 struct tcp_proxy_client_mapping_config {
     uint16_t local_port;
@@ -185,7 +190,7 @@ struct global_config {
 
     // NTP configuration ([ntp] section)
     int ntp_enabled;
-    char ntp_servers[5][256];             // up to 5 NTP server hostnames
+    struct CFG_NTP_SERVER *ntp_servers;   // linked list, unlimited
     int ntp_server_count;
     int ntp_resync_interval;              // seconds, default 3600
 };