minimum upper bounds in attribute definitions

[John Woodell <woodie@worldpac.com>]

Hey Kurt,

Can you give us some tips about minimum upper bounds in attribute 
definitions?

https://bugzilla.mozilla.org/show_bug.cgi?id=116692#c184

> We seem to have minimum upper bounds set on the lengths of some attributes and
> not others, and the ones that do upper bounds seem to be somewhat inconsistent
> with one another.  How were these numbers selected?  Is there a compelling
> reason to have these upper bounds at all?