Network overhaul : support for multiple NICs, performance improvement

- Add support for multiple NICs
- Switch from polling to an event loop for the host networking to avoid latency and locking issues

src/86box.c

@@ -60,7 +60,6 @@
 #include <86box/device.h>
 #include <86box/pit.h>
 #include <86box/random.h>
-#include <86box/timer.h>
 #include <86box/nvr.h>
 #include <86box/machine.h>
 #include <86box/bugger.h>
@@ -85,6 +84,7 @@
 #include <86box/mo.h>
 #include <86box/scsi_disk.h>
 #include <86box/cdrom_image.h>
+#include <86box/thread.h>
 #include <86box/network.h>
 #include <86box/sound.h>
 #include <86box/midi.h>
@@ -93,7 +93,6 @@
 #include <86box/ui.h>
 #include <86box/path.h>
 #include <86box/plat.h>
-#include <86box/thread.h>
 #include <86box/version.h>
 #include <86box/gdbstub.h>
 #include <86box/machine_status.h>
@@ -951,8 +950,6 @@ pc_reset_hard_close(void)
 	/* Close all the memory mappings. */
 	mem_close();
 
-	network_timer_stop();
-
 	/* Turn off timer processing to avoid potential segmentation faults. */
 	timer_close();
 
@@ -1173,8 +1170,6 @@ pc_close(thread_t *ptr)
 	/* Close all the memory mappings. */
 	mem_close();
 
-	network_timer_stop();
-
 	/* Turn off timer processing to avoid potential segmentation faults. */
 	timer_close();