FEATURE: touch command

Reflected the mentioned issue.

memcached.c

@@ -13090,8 +13090,8 @@ static void process_touch_command(conn *c, token_t *tokens, const size_t ntokens
     assert(c != NULL);
     assert(c->ewouldblock == false);
 
-    char *key = tokens[KEY_TOKEN].value; // get users key input
-    size_t nkey = tokens[KEY_TOKEN].length; // 
+    char *key = tokens[KEY_TOKEN].value;
+    size_t nkey = tokens[KEY_TOKEN].length; 
 
     ENGINE_ERROR_CODE ret = ENGINE_SUCCESS;
 
@@ -13100,7 +13100,7 @@ static void process_touch_command(conn *c, token_t *tokens, const size_t ntokens
 
     int64_t exptime=0;
 
-    if ((! safe_strtoll(tokens[KEY_TOKEN+1].value, &exptime)))
+    if (! safe_strtoll(tokens[KEY_TOKEN+1].value, &exptime))
     {
         print_invalid_command(c, tokens, ntokens);
         out_string(c, "CLIENT_ERROR bad command line format");
@@ -13130,16 +13130,15 @@ static void process_touch_command(conn *c, token_t *tokens, const size_t ntokens
         break;
     default:
         STATS_CMD_NOKEY(c, setattr);
-        if (ret == ENGINE_EBADATTR)       out_string(c, "ATTR_ERROR not found");
-        else if (ret == ENGINE_EBADVALUE) out_string(c, "ATTR_ERROR bad value");
+        if (ret == ENGINE_EBADVALUE) out_string(c, "ATTR_ERROR bad value");
         else handle_unexpected_errorcode_ascii(c, __func__, ret);
     }
 
 }
 
 static void process_command_ascii(conn *c, char *command, int cmdlen)
 {
-    /* One more token is reserved in tokens structure
+    /* One more token is reserved in tokens strucure
      * for keeping the length of untokenized command.
      */
     token_t tokens[MAX_TOKENS+1];