Updates following review feedback

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2609)
diff --git a/apps/s_client.c b/apps/s_client.c
index a2ededc..7d6eb02 100644
--- a/apps/s_client.c
+++ b/apps/s_client.c
@@ -2608,8 +2608,8 @@
                 cbuf_len = 0;
             }
 
-            if ((!c_ign_eof) && ((cbuf[0] == 'K' || cbuf[0] == 'k' )
-                                 && cmdletters)) {
+            if (!c_ign_eof && (cbuf[0] == 'K' || cbuf[0] == 'k' )
+                    && cmdletters) {
                 BIO_printf(bio_err, "KEYUPDATE\n");
                 SSL_key_update(con,
                                cbuf[0] == 'K' ? SSL_KEY_UPDATE_REQUESTED