Remove spaces between "new", "old" label modifiers and "auid", "ses" labels in
log output since userspace tools can't parse orphaned keywords.

Make variable names more consistent and intuitive.

Make audit_log_format() argument code easier to read.
Signed-off-by: NRichard Guy Briggs <rgb@redhat.com>
Signed-off-by: NEric Paris <eparis@redhat.com>