Eliminate the use of variables for format strings in kdb5_util. Many

Eliminate the use of variables for format strings in kdb5_util.  Many
were unused, and localization will probably be done through _()
macros, not collecting all the strings together.  Elminates a number
of format-security static analysis defects.

ticket: 6714
status: open

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@23962 dc483132-0cff-0310-8789-dd5450dbe970