disambiguate util/backend package and remove backend prelaod

lib/App/Netdisco/Util/MCE.pm

@@ -0,0 +1,28 @@
+package App::Netdisco::Util::MCE;
+
+use strict;
+use warnings;
+
+use MCE::Util ();
+
+use base 'Exporter';
+our @EXPORT = qw/prctl parse_max_workers/;
+
+sub prctl { $0 = shift }
+
+sub parse_max_workers {
+  my $max = shift;
+  return 0 if !defined $max;
+
+  if ($max =~ /^auto(?:$|\s*([\-\+\/\*])\s*(.+)$)/i) {
+      my $ncpu = MCE::Util::get_ncpu() || 0;
+
+      if ($1 and $2) {
+          local $@; $max = eval "int($ncpu $1 $2 + 0.5)";
+      }
+  }
+
+  return $max || 0;
+}
+
+1;