fix duplicate symbols from posix_compat, openbsd_compat with libcrypto (#593)

Author: awakecoding

contrib/win32/openssh/config.h.vs

@@ -206,13 +206,13 @@
 /* #undef HAVE_ADDR_V6_IN_UTMPX */
 
 /* Define to 1 if you have the `arc4random' function. */
-/* #undef HAVE_ARC4RANDOM */
+#define HAVE_ARC4RANDOM 1
 
 /* Define to 1 if you have the `arc4random_buf' function. */
-/* #undef HAVE_ARC4RANDOM_BUF */
+#define HAVE_ARC4RANDOM_BUF 1
 
 /* Define to 1 if you have the `arc4random_uniform' function. */
-/* #undef HAVE_ARC4RANDOM_UNIFORM */
+#define HAVE_ARC4RANDOM_UNIFORM 1
 
 /* Define to 1 if you have the `asprintf' function. */
 /* #undef HAVE_ASPRINTF */

contrib/win32/win32compat/misc.c

@@ -190,7 +190,7 @@ nanosleep(const struct timespec *req, struct timespec *rem)
  * Copyright (c) 2009, 2010 NoMachine
  * All rights reserved
  */
-int
+static int
 gettimeofday(struct timeval *tv, void *tz)
 {
 	union {
@@ -212,7 +212,7 @@ gettimeofday(struct timeval *tv, void *tz)
 	return 0;
 }
 
-void
+static void
 explicit_bzero(void *b, size_t len)
 {
 	SecureZeroMemory(b, len);
@@ -1480,7 +1480,7 @@ localtime_r(const time_t *timep, struct tm *result)
 	return localtime_s(result, timep) == 0 ? result : NULL;
 }
 
-void
+static void
 freezero(void *ptr, size_t sz)
 {
 	if (ptr == NULL)