Two Tasmota_HTTP_Item.pm async mode issues

[ggodart]

1. There is a small typo on line 203 of Tasmota_HTTP_Item.pm which throws an error if using async mode, it should read
   $self->send_cmd($cmd);
   and not
   $self->send_cmnd($cmd);

2. It changes the set_by value to 'process item' if you use the async mode, making debugging much more difficult. I got around this by adding
   $self->{this_set_by} = $set_by;
   at the beginning of the set subroutine and
   in process_check changing
   #$self->SUPER::set( $state, "process item") unless (lc $state eq lc $self->state());
   to
   $self->SUPER::set( $state, $self->{this_set_by}) unless (lc $state eq lc $self->state());