[LSC Request] End of header meta command

[Chris Dee]

a) Have a EOH meta

= option 3 here

b) Have every line in the header be under a meta that is illegal to be found outside of the header. This way once the first line without a header meta is encountered, that's the end of the header.

I believe the only untagged header content is "Needs work" comments, so = option 1 here