foreach my $preconfig (keys %preconfig) {
foreach my $cfg (keys %{$preconfig{$preconfig}}) {
my $conf = $preconfig{$preconfig}->{$cfg}->{id};
$conf =~ tr/\.-/__/;
print <<EOF
config UCI_PRECONFIG_$conf
foreach my $preconfig (keys %preconfig) {
foreach my $cfg (keys %{$preconfig{$preconfig}}) {
my $conf = $preconfig{$preconfig}->{$cfg}->{id};
$conf =~ tr/\.-/__/;
print <<EOF
config UCI_PRECONFIG_$conf