wiki was this related to $(hdr(name)[N]):
If [N] is omitted then the body of the first header is printed. The
first header is got when N=0, for the second N=1, a.s.o. In case of a
comma-separated multi-body headers, it returns all the bodies,
comma-separated.
i don't understand the last sentence. how can i get all bodies of all
headers of name=x as a comma separated list?
-- juha