PIProtectedVariable - user now can`t mistake

PIHTTPServer improvements

libs/main/http_server/pihttpservermodule.h

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+/*
+    PIP - Platform Independent Primitives
+    Module includes
+    Ivan Pelipenko peri4ko@yandex.ru, Andrey Bychkov work.a.b@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+//! \defgroup HTTPServer HTTPServer
+//! \~\brief
+//! \~english HTTP server
+//! \~russian HTTP сервер
+//!
+//! \~\details
+//! \~english \section cmake_module_HTTPServer Building with CMake
+//! \~russian \section cmake_module_HTTPServer Сборка с использованием CMake
+//!
+//! \~\code
+//! find_package(PIP REQUIRED)
+//! target_link_libraries([target] PIP::HTTPServer)
+//! \endcode
+//!
+//! \~english \par Common
+//! \~russian \par Общее
+//!
+//! \~english
+//! These files provides HTTP server based on libmicrohttpd
+//!
+//! \~russian
+//! Эти файлы обеспечивают HTTP сервер, основанный на libmicrohttpd
+//!
+//! \~\authors
+//! \~english
+//! Ivan Pelipenko peri4ko@yandex.ru;
+//! \~russian
+//! Иван Пелипенко peri4ko@yandex.ru;
+//!
+
+#ifndef pihttpservermodule_H
+#define pihttpservermodule_H
+
+#include "pihttpserver.h"
+
+#endif