Best place to have ini_set

[eluser]Unknown[/eluser]
I'm currently working on a project with heavy SOAP WebServices integration.

I will use php stubs generated from the WDSLs.

To keep track of changes in the WDSLs I have the wsdl cache disabled for development. For performance reasons I will have the wsdl cache enabled for the live version.

Now here's the question: We're is the best place to put the

Code:

ini_set('soap.wsdl_cache_enabled', 1);

Put it in config.php ?
Put it in a custom config file ?
Put it into the Library (which uses the php stub) ?
Put it into the model using the library ?

Thanks in advance
Peter