expand usage for -S

diff --git a/socklib/sock_source.c b/socklib/sock_source.c
index 5074fdf444945af08c2b62c22b9cf453a01851da..a12a7766c8cfcf72cb669938c529dabfdf782d7e 100644 (file)
--- a/socklib/sock_source.c
+++ b/socklib/sock_source.c
@@ -103,6 +103,7 @@ static void listener(void)
 static void usage(void)
 {
        printf("-p port\n-t socket options\n-b bufsize\n\n");
+       printf("Use -S to enable sendfile\n");
 }
 
 int main(int argc, char *argv[])