pull up r19395 from trunk

pull up r19395 from trunk

 r19395@cathode-dark-space:  tlyu | 2007-04-03 15:23:52 -0400
 ticket: new
 subject: MITKRB5-SA-2007-002: buffer overflow in krb5_klog_syslog
 target_version: 1.6.1
 tags: pullup

 Fix MITKRB5-SA-2007-002: buffer overflow in krb5_klog_syslog.

 	* src/lib/krb5/krb/get_in_tkt.c (krb5_klog_syslog): Use vsnprintf
 	if available.

 Everything else: use precision fields on "%s" specifiers to truncate
 logged strings, in case someone doesn't have vsnprintf.

ticket: 5513
version_fixed: 1.5.3

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-5@19404 dc483132-0cff-0310-8789-dd5450dbe970