Fix FreeBSD build with --strict-warnings
apps/lib/http_server.c needs to include string.h in order to get a prototype
for strerror().
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/11797)
diff --git a/apps/lib/http_server.c b/apps/lib/http_server.c
index 6db11f4..2b5c9f5 100644
--- a/apps/lib/http_server.c
+++ b/apps/lib/http_server.c
@@ -17,6 +17,7 @@
# define _POSIX_C_SOURCE 2
#endif
+#include <string.h>
#include <ctype.h>
#include "http_server.h"
#include "internal/sockets.h"
