client.c: set connect attributes as late as possible

just before they're sent to the client. Because mysql->host
value is known only after the connection is established,
and it's needed for the "_sever_host" attribute.

This fixes ASAN use-after-free warning in rpl tests

followup for ee8dfc68

sql-common/client.c

@@ -3123,9 +3123,6 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
     DBUG_RETURN(0);
   }
 
-  if (set_connect_attributes(mysql, buff, sizeof(buff)))
-    DBUG_RETURN(0);
-
   mysql->methods= &client_methods;
   mysql->client_flag=0;			/* For handshake */
 
@@ -3579,6 +3576,8 @@ CLI_MYSQL_REAL_CONNECT(MYSQL *mysql,const char *host, const char *user,
 
   mysql->client_flag= client_flag;
 
+  set_connect_attributes(mysql, buff, sizeof(buff));
+
   /*
     Part 2: invoke the plugin to send the authentication data to the server
   */