pull up r25424 from trunk

pull up r25424 from trunk

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 r25424 | ghudson | 2011-10-31 12:43:40 -0400 (Mon, 31 Oct 2011) | 9 lines

 ticket: 6996
 subject: Make krb5_check_clockskew public
 target_version: 1.10
 tags: pullup

 Rename krb5int_check_clockskew to krb5_check_clockskew and make it
 public, in order to give kdcpreauth plugins a way to check timestamps
 against the configured clock skew.

ticket: 6996
version_fixed: 1.10
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-10@25456 dc483132-0cff-0310-8789-dd5450dbe970