added Socket Project

Socket/CMakeLists.txt

+cmake_minimum_required(VERSION 3.1.0)
+project(lfr_socket VERSION 0.1.0)
+
+include(CTest)
+enable_testing()
+
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+
+find_package(Threads REQUIRED)
+
+add_executable(lfr_socket lfr_socket.cpp)
+
+target_link_libraries( lfr_socket Threads::Threads)
+
+set(CPACK_PROJECT_NAME ${PROJECT_NAME})
+set(CPACK_PROJECT_VERSION ${PROJECT_VERSION})
+include(CPack)

Socket/lfr_socket.cpp

+#include "lfr_socket.h"
+#include <boost/regex.hpp>
+#include <iostream>
+#include <string>
+
+int main()
+{
+    std::string line;
+    boost::regex pat( "^Subject: (Re: |Aw: )*(.*)" );
+
+    while (std::cin)
+    {
+        std::getline(std::cin, line);
+        boost::smatch matches;
+        if (boost::regex_match(line, matches, pat))
+            std::cout << matches[2] << std::endl;
+    }
+}

Socket/lfr_socket.h

+#pragma once
+
+#include <iostream>