Added ability to end the proxy with SIGUSR1

The idea was maybe we were ending the proxy with sockets
and whatever still shutting down.  But we're still showing
leaks.  And the linenumbers don't make any sense.

Commenting out the lines, just changes the lines where it says
the leaks are happening.

grind.sh

@@ -1,7 +1,14 @@
 #!/bin/bash
 
 # valgrind -v --log-file=grind.log build/space-ace -l -u grinder
-valgrind -v --leak-check=full --show-leak-kinds=all --log-file=grind.log build/twproxy $1 $2 $3
 
+# start in background
+valgrind -v --leak-check=full --show-leak-kinds=all --log-file=grind.log build/twproxy grind.yaml &
+
+PID=$!
+echo "valgrind is pid $PID"
+ps --ppid $PID
+
+wait
 
 tail grind.log

session.cpp

@@ -688,16 +688,30 @@ void Session::stayin_alive(const boost::system::error_code error) {
 Server::Server(boost::asio::io_service &io_service,
                const boost::asio::ip::tcp::endpoint &endpoint, std::string host,
                std::string port)
-    : io_service_{io_service}, acceptor_{io_service_, endpoint}, host_{host},
-      port_{port} {
+    : io_service_{io_service}, acceptor_{io_service_, endpoint},
+      signal_{io_service, SIGUSR1}, host_{host}, port_{port} {
   only_one = false;
+  keep_accepting = true;
   if (CONFIG["one_connection"])
     only_one = CONFIG["one_connection"].as<int>() == 1;
 
   BUGZ_LOG(info) << "Server::Server()";
+  signal_.async_wait(boost::bind(&Server::on_signal, this,
+                                 boost::asio::placeholders::error,
+                                 boost::asio::placeholders::signal_number));
   do_accept();
 }
 
+void Server::on_signal(const boost::system::error_code &ec, int signal) {
+  BUGZ_LOG(info) << "SIGUSR1";
+  keep_accepting = false;
+  boost::system::error_code error;
+  acceptor_.cancel(error);
+  BUGZ_LOG(info) << "cancel: " << error;
+  acceptor_.close(error);
+  BUGZ_LOG(info) << "close: " << error;
+}
+
 Server::~Server() { BUGZ_LOG(info) << "Server::~Server()"; }
 /**
  * setup async connect accept
@@ -715,7 +729,8 @@ void Server::do_accept(void) {
           ->start();
     }
 
-    if (!only_one) {
+    if (keep_accepting) {
+      BUGZ_LOG(info) << "do_accept()";
       do_accept();
     }
   });

session.h

@@ -3,6 +3,7 @@
 
 #include <boost/asio.hpp>
 #include <boost/asio/ip/basic_resolver.hpp>
+#include <boost/asio/signal_set.hpp>
 #include <map>
 #include <string>
 
@@ -17,7 +18,6 @@ The Session:
 
  */
 
-
 class Session : public std::enable_shared_from_this<Session> {
 public:
   Session(boost::asio::ip::tcp::socket socket,
@@ -186,9 +186,13 @@ public:
 
 private:
   void do_accept(void);
+  void on_signal(const boost::system::error_code &ec, int signal);
 
   boost::asio::io_service &io_service_;
   boost::asio::ip::tcp::acceptor acceptor_;
+  boost::asio::signal_set signal_;
+
+  bool keep_accepting;
 
   /**
    * The host to connect to (from config)

twproxy.cpp

@@ -68,7 +68,7 @@ void init_logging(void) {
     log_level = CONFIG["log_level"].as<int>();
   }
 
-  bool console = true;
+  bool console = false;
   if (CONFIG["log_console"]) {
     console = CONFIG["log_console"].as<int>() == 1;
   }
@@ -79,14 +79,15 @@ void init_logging(void) {
   std::cout << log_filename << " level: " << log_level
             << " flush: " << log_autoflush << std::endl;
 
-  boost::log::add_console_log(
-      std::clog, boost::log::keywords::auto_flush = log_autoflush,
-      boost::log::keywords::format =
-          (boost::log::expressions::stream
-           << boost::log::expressions::format_date_time<
-                  boost::posix_time::ptime>("TimeStamp", log_timeformat)
-           << " " << std::setw(8) << boost::log::trivial::severity << " "
-           << boost::log::expressions::smessage));
+  if (console)
+    boost::log::add_console_log(
+        std::clog, boost::log::keywords::auto_flush = log_autoflush,
+        boost::log::keywords::format =
+            (boost::log::expressions::stream
+             << boost::log::expressions::format_date_time<
+                    boost::posix_time::ptime>("TimeStamp", log_timeformat)
+             << " " << std::setw(8) << boost::log::trivial::severity << " "
+             << boost::log::expressions::smessage));
 
   boost::log::add_file_log(
       boost::log::keywords::file_name = log_filename,