Adjust ConfigPlaces.

Index: README
--- README.orig
+++ README
@@ -15,7 +15,7 @@ and available to the default shell.
 
 The program consists of two files: "ietf" (the executable) and "ietf.config"
 (mandatory configuration settings). The latter file must be either in one of
-the following directories: ~/bin/, /usr/local/bin/, or ~/.ietf/. The
+the following directories: ~/.ietf/ or ${SYSCONFDIR}/. The
 executable can be anywhere, but is probably best kept with the configuration
 file.