Apply all the clang-tidy modernize-* fixes

src/network/poller.cpp

@@ -2,8 +2,8 @@
 #include <logger/logger.hpp>
 #include <utils/timed_events.hpp>
 
-#include <assert.h>
-#include <errno.h>
+#include <cassert>
+#include <cerrno>
 #include <stdio.h>
 #include <signal.h>
 #include <unistd.h>

src/network/tcp_client_socket_handler.cpp

@@ -256,6 +256,6 @@ std::string TCPClientSocketHandler::get_port() const
 
 bool TCPClientSocketHandler::match_port_pairt(const uint16_t local, const uint16_t remote) const
 {
-  const uint16_t remote_port = static_cast<uint16_t>(std::stoi(this->port));
+  const auto remote_port = static_cast<uint16_t>(std::stoi(this->port));
   return this->is_connected() && local == this->local_port && remote == remote_port;
 }

src/network/tcp_server_socket.hpp

@@ -12,7 +12,6 @@
 #include <netinet/ip.h>
 
 #include <cstring>
-#include <cassert>
 
 template <typename RemoteSocketType>
 class TcpSocketServer: public SocketHandler

src/network/tcp_socket_handler.cpp

@@ -8,7 +8,7 @@
 #include <sys/types.h>
 #include <stdexcept>
 #include <unistd.h>
-#include <errno.h>
+#include <cerrno>
 #include <cstring>
 
 #ifdef BOTAN_FOUND