ZONELIST_HEADER
hdr[strlen(ZONELIST_HEADER)] = 0;
if(fread(hdr, 1, strlen(ZONELIST_HEADER), opt->zonelist) !=
strlen(ZONELIST_HEADER) || strncmp(hdr, ZONELIST_HEADER,
strlen(ZONELIST_HEADER)) != 0) {
r = fprintf(opt->zonelist, ZONELIST_HEADER);
if(r != strlen(ZONELIST_HEADER)) {
r = fprintf(out, ZONELIST_HEADER);
} else if(r != strlen(ZONELIST_HEADER)) {