Stricter MG_ARCH_CUSTOM and type conversions in sock.c

src/arch_esp32.h

@@ -2,9 +2,21 @@
 
 #if MG_ARCH == MG_ARCH_ESP32
 
+#include <ctype.h>
 #include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
 #include <netdb.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+
 #define MG_DIRSEP '/'
 #define MG_INT64_FMT "%lld"
 #ifndef MG_PATH_MAX