Accept a list of files??

Security audit

hardlinks

Don't produce stack trace which looks like crash/include file name in
logging stats

Michael S. Muegel suggestion: "--char-translate source-char
replacement-string" for use between windows/unix conversions, e.g. ':'
to _colon_.  Also distinguish new vs changed update in lvl 5 logging.

CB:  Log the filenames skipped (not just excluded) for various reasons