Fix std.c.windows.winsock deprecation warning

Author: CyberShadow

deimos/openssl/bio.d

@@ -78,9 +78,9 @@ version(OPENSSL_NO_SCTP) {} else {
 version (Posix) {
 	import core.sys.posix.netdb;
 } else version (Windows) {
-	import std.c.windows.winsock;
+	import core.sys.windows.winsock2;
 } else version (Win64) {
-	import std.c.windows.winsock;
+	import core.sys.windows.winsock2;
 }
 
 public import deimos.openssl.crypto;

deimos/openssl/dtls1.d

@@ -73,15 +73,15 @@ public import deimos.openssl.pqueue;
 // #endif
 version (Windows) {
 /* Needed for timeval */
-import std.c.windows.winsock;
+import core.sys.windows.winsock2;
 // #elif defined(OPENSSL_SYS_NETWARE) && !defined(_WINSOCK2API_)
 // #include <sys/timeval.h>
 // #else
 // #if defined(OPENSSL_SYS_VXWORKS)
 // #include <sys/times.h>
 // #else
 } else version (Win64) {
-import std.c.windows.winsock;
+import core.sys.windows.winsock2;
 } else {
 import core.sys.posix.sys.time;
 }