Create nwc_interface_broadcast

Currently the broadcast values are calculated on the total number o packets.
This is to ask a change in order to have tha value calculated on the input/outputRate.
GR

nwc_interface_broadcast

@@ -0,0 +1,40 @@
+  } elsif ($self->mode =~ /device::interfaces::broadcast/) {
+    $self->add_info(sprintf 'interface %s broadcast in:%.2f out:%.2f ',
+        $full_descr,
+        $self->{broadcastInPercent} / 100 * $self->{inputRate} , $self->{broadcastOutPercent} / 100 * $self->{outputRate} );
+    $self->set_thresholds(
+        metric => $self->{ifDescr}.'_broadcast_in',
+        warning => $self->{maxInputRate} / 100 * 10,
+        critical => $self->{maxInputRate} / 100 * 20,
+    );
+    my $in = $self->check_thresholds(
+        metric => $self->{ifDescr}.'_broadcast_in',
+        value => $self->{broadcastInPercent} / 100 * $self->{inputRate},
+    );
+    $self->set_thresholds(
+        metric => $self->{ifDescr}.'_broadcast_out',
+        warning => $self->{maxOutputRate} / 100 * 10,
+        critical => $self->{maxOutputRate} / 100 * 20,
+    );
+    my $out = $self->check_thresholds(
+        metric => $self->{ifDescr}.'_broadcast_out',
+        value => $self->{broadcastOutPercent} / 100 * $self->{outputRate},
+    );
+    my $level = ($in > $out) ? $in : ($out > $in) ? $out : $in;
+    $self->add_message($level);
+    $self->add_perfdata(
+        label => $self->{ifDescr}.'_broadcast_in',
+        value => $self->{broadcastInPercent} / 100 * $self->{inputRate},
+        uom => $self->opts->units =~ /^(B|KB|MB|GB|TB)$/ ? $self->opts->units : undef,
+        places => 2,
+        min => 0,
+        max => $self->{maxInputRate},
+    );
+    $self->add_perfdata(
+        label => $self->{ifDescr}.'_broadcast_out',
+        value => $self->{broadcastOutPercent} / 100 * $self->{outputRate},
+        uom => $self->opts->units =~ /^(B|KB|MB|GB|TB)$/ ? $self->opts->units : undef,
+        places => 2,
+        min => 0,
+        max => $self->{maxOutputRate},
+    );