bugfix invalid ptr in "ev.data.ptr" after vector<Client> resize/erase

+ persistent connections reintroduced
+ bugfix crash if invalid path in request

srcs/webserv/accept.cpp

@@ -22,5 +22,5 @@ void	Webserv::_accept_connection(int fd)
 	_clients.push_back(Client());
 	_clients.back().fd = accepted_fd;
 
-	_epoll_update(accepted_fd, EPOLLIN, EPOLL_CTL_ADD, &_clients.back());
+	_epoll_update(accepted_fd, EPOLLIN, EPOLL_CTL_ADD);
 }