# indexes a message, returns true if checkpointing is needed
sub do_idx ($$$$$$$) {
my ($self, $msgref, $mime, $len, $num, $oid, $mid0) = @_;
# indexes a message, returns true if checkpointing is needed
sub do_idx ($$$$$$$) {
my ($self, $msgref, $mime, $len, $num, $oid, $mid0) = @_;