my $hdr = substr($$ref, 0, $header_size_limit + 1);
hdr_truncate($hdr) if length($hdr) > $header_size_limit;
bless { hdr => \$hdr, crlf => $1 }, __PACKAGE__;
my $hdr = substr($$ref, 0, $header_size_limit + 1);
hdr_truncate($hdr) if length($hdr) > $header_size_limit;
bless { hdr => \$hdr, crlf => $1 }, __PACKAGE__;