History for Strbuf and ParseOpts?

[ Please CC me on replies.  Thanks! ]i,

Hi,

I shouldn't conflate to two (parseopts and strbuf) but can someone
tell me how these two things came about -- that is, when/why/how?  If
I understand strbuf correctly, it's a transparent and dynamic way of
handling strings?  If so, how useful would it be as a separate
project?

TIA!

David