ssize_t rfc822_write_address_single(char *, ssize_t, address_t *, int);
ssize_t rfc822_strcpy(char *, ssize_t, const char *, const char *);
ssize_t rfc822_write_address_single(char *, ssize_t, address_t *, int);
ssize_t rfc822_strcpy(char *, ssize_t, const char *, const char *);