Gate BIO_new_socket in OPENSSL_NO_SOCK in handwritten bindings

OpenSSL conditions the availability of this symbol on OPENSSL_NO_SOCK.
Match that in the handwritten bindings.

This doesn't really matter as it's only in the handwritten bindings and
not used by rust-openssl, but we may as well make it match OpenSSL.

Author: davidben

openssl-sys/build/expando.c

@@ -111,6 +111,10 @@ RUST_CONF_OPENSSL_NO_SSL3_METHOD
 RUST_CONF_OPENSSL_NO_TLSEXT
 #endif
 
+#ifdef OPENSSL_NO_SOCK
+RUST_CONF_OPENSSL_NO_SOCK
+#endif
+
 #ifdef OPENSSL_NO_STDIO
 RUST_CONF_OPENSSL_NO_STDIO
 #endif

openssl-sys/src/handwritten/bio.rs

@@ -58,6 +58,7 @@ const_ptr_api! {
 }
 
 extern "C" {
+    #[cfg(not(osslconf = "OPENSSL_NO_SOCK"))]
     pub fn BIO_new_socket(sock: c_int, close_flag: c_int) -> *mut BIO;
 
     #[cfg(any(ossl110, libressl273))]