Pull up r22782, r22784, r23610 from trunk, with additional test suite

Pull up r22782, r22784, r23610 from trunk, with additional test suite
changes to compensate for the existence of the api.0/ unit tests that
removed for 1.8.  Don't pull up the kadmin CLI changes for now.

 ------------------------------------------------------------------------
 r23610 | ghudson | 2010-01-07 21:43:21 -0500 (Thu, 07 Jan 2010) | 10 lines

 ticket: 6626
 subject: Restore interoperability with 1.6 addprinc -randkey
 tags: pullup
 target_version: 1.8

 The arcfour string-to-key operation in krb5 1.7 (or later) disagrees
 with the dummy password used by the addprinc -randkey operation in
 krb5 1.6's kadmin client, because it's not valid UTF-8.  Recognize the
 1.6 dummy password and use a random password instead.

 ------------------------------------------------------------------------
 r22784 | ghudson | 2009-09-24 11:40:26 -0400 (Thu, 24 Sep 2009) | 2 lines

 Fix kadm5 unit test modified in r22782.

 ------------------------------------------------------------------------
 r22782 | ghudson | 2009-09-21 14:40:02 -0400 (Mon, 21 Sep 2009) | 5 lines

 Improve the mechanism used for addprinc -randkey.  In the kadmin
 server, if the password is null when creating a principal, treat that
 as a request for a random key.  In the kadmin client, try using the
 new method for random key creation and then fall back to the old one.

ticket: 6635
version_fixed: 1.7.1
target_version: 1.7.1
status: resolved
tags: pullup

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@23650 dc483132-0cff-0310-8789-dd5450dbe970