[GENERAL]
scheduledb=something
[SERVICE]
start2=stuff ${GENERAL/scheduledb=default} etcetera

##</code><code>##

sub x_val {
  my ($ini,$sect,$key,$def)=@_; # same signature as 'val'
  my $val=$ini->val($sect,$key,$def);
  my ($sect1,$key1,$def1,$t);
  while ($val=~/\$\{([^}]+)\}/) {
   $t=$1;
   ($sect1,$key1,$def1)=($t=~m|^([^/]+)/([^=]+)(?:=(.*))?$|);
   $val=$`.(x_val($ini,$sect1,$key1,$def1)).$';
  }
 $val;
}