BIO_s_connect: Make internal functions static

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from #21715)

crypto/bio/bss_conn.c

@@ -52,8 +52,8 @@ static long conn_callback_ctrl(BIO *h, int cmd, BIO_info_cb *);
 
 static int conn_state(BIO *b, BIO_CONNECT *c);
 static void conn_close_socket(BIO *data);
-BIO_CONNECT *BIO_CONNECT_new(void);
-void BIO_CONNECT_free(BIO_CONNECT *a);
+static BIO_CONNECT *BIO_CONNECT_new(void);
+static void BIO_CONNECT_free(BIO_CONNECT *a);
 
 #define BIO_CONN_S_BEFORE                1
 #define BIO_CONN_S_GET_ADDR              2
@@ -252,7 +252,7 @@ static int conn_state(BIO *b, BIO_CONNECT *c)
     return ret;
 }
 
-BIO_CONNECT *BIO_CONNECT_new(void)
+static BIO_CONNECT *BIO_CONNECT_new(void)
 {
     BIO_CONNECT *ret;
 
@@ -263,7 +263,7 @@ BIO_CONNECT *BIO_CONNECT_new(void)
     return ret;
 }
 
-void BIO_CONNECT_free(BIO_CONNECT *a)
+static void BIO_CONNECT_free(BIO_CONNECT *a)
 {
     if (a == NULL)
         return;