powertop: new applet

Signed-off-by: Marek Polacek <mmpolacek@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/Config.src b/libbb/Config.src
index 74dc9c5..f6c7a11 100644
--- a/libbb/Config.src
+++ b/libbb/Config.src
@@ -43,6 +43,17 @@
 	  a rarely used feature which allows you to use names
 	  instead of IP/mask pairs in route command.
 
+config FEATURE_USE_TERMIOS
+	bool "Use termios to manipulate the screen"
+	default y
+	depends on MORE || TOP || POWERTOP
+	help
+	  This option allows utilities such as 'more' and 'top' to determine
+	  the size of the screen. If you leave this disabled, your utilities
+	  that display things on the screen will be especially primitive and
+	  will be unable to determine the current screen size, and will be
+	  unable to move the cursor.
+
 config FEATURE_EDITING
 	bool "Command line editing"
 	default y