python/python-kerberos: Wrap README at 72 columns.

Signed-off-by: B. Watson <yalhcru@gmail.com>

python/python-kerberos/README

@@ -1,5 +1,5 @@
-This Python package is a high-level wrapper for Kerberos (GSSAPI) operations.
-The goal is to avoid having to build a module that wraps the entire
-Kerberos.framework, and instead offer a limited set of functions that do what
-is needed for client/server Kerberos authentication based on
-<http://www.ietf.org/rfc/rfc4559.txt>
+This Python package is a high-level wrapper for Kerberos (GSSAPI)
+operations. The goal is to avoid having to build a module that
+wraps the entire Kerberos.framework, and instead offer a limited
+set of functions that do what is needed for client/server Kerberos
+authentication based on http://www.ietf.org/rfc/rfc4559.txt