Whitespace changes, mostly horizontal, for consistency with current

Whitespace changes, mostly horizontal, for consistency with current
style: indentation levels, spacing around if/else/for/while and
braces.  Still plenty of inconsistency with current coding standards,
especially for when line breaks are to be used.  Didn't touch
multi-line macro definitions, or .h function declarations.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@20707 dc483132-0cff-0310-8789-dd5450dbe970