added timeout response (status 408)

+ added EPOLLERR and EPOLLHUP handling
+ fix root substitution for default "/" location (temp or permanent ?)
+ tested siege a little, seems good

srcs/webserv/timeout.cpp

@@ -0,0 +1,18 @@
+
+#include "Webserv.hpp"
+
+void	Webserv::_timeout()
+{
+	std::cerr << "_timeout()\n";
+	std::vector<Client>::iterator	it = _clients.begin();
+	while (it != _clients.end())
+	{
+		if (!it->request_complete)
+		{
+			std::cerr << "timeout request fd " << it->get_cl_fd() << "\n";
+			it->status = 408;
+			_epoll_update(it->get_cl_fd(), EPOLLOUT, EPOLL_CTL_MOD);
+		}
+		++it;
+	}
+}