pull up r22188 from trunk

pull up r22188 from trunk
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 r22188 | ghudson | 2009-04-10 12:09:19 -0400 (Fri, 10 Apr 2009) | 8 lines
 Changed paths:
    M /trunk/doc/admin.texinfo
    M /trunk/doc/support-enc.texinfo

 ticket: 6452
 subject: Document allow_weak_crypto
 tags: pullup
 target_version: 1.7

 Also document which cryptosystems are defined to be weak, and add some
 enctype entries which weren't in the documentation.

ticket: 6452
version_fixed: 1.7

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@22258 dc483132-0cff-0310-8789-dd5450dbe970