mess822 - parse a mail message header in RFC 822 format

#include <mess822.h>

int mess822_begin(&h,a);
int mess822_line(&h,&line);
int mess822_end(&h);

int mess822_ok(&line);

stralloc line;
mess822_action a[];
mess822_header h = MESS822_HEADER;

To be filled in.

mess822_addr(3), mess822_date(3), mess822_fold(3), mess822_quote(3), mess822_token(3), mess822_when(3),