PATCH: better progress reporting

[Cameron Simpson]

I wrote about rfc-822 header style::
| The obvious downside that you
| can detect end of record without seeing the beginning of the next record,
| which sucks for progress reporting. This applies to your proposal too.

But of ourse rfc822 headers are terminated by a blank line, so ignore this.
-- 
Cameron Simpson, DoD#743        cs at zip.com.au    http://www.zip.com.au/~cs/

I will not do it as a hack       I will not do it for my friends
I will not do it on a Mac        I will not write for Uncle Sam
I will not do it on weekends	 I won't do ADA, Sam-I-Am
	- Gregory Bond <gnb at bby.com.au>