[lxml] need XML_PARSE_BIG_LINES parser option?

Hi,

For XBRL usage we routinely have humongous files well over millions of lines, and I think we need the XML_PARSE_BIG_LINES libxml parser option so we don't get line numbers crunched to short ints.

Other than recompiling from source, is there a way to expose this option (or just use it for everybody)? (End users don't like the thought of custom-hacked lxml.)

Herm Fischer (for Arelle project)