Adjusting portfiles - mysql5

[Chris Janton]

There is an option available for MySQL5 configuration

	--with-federated-storage-engine

this option is not listed in the portfile - brief info
# $Id: Portfile 26962 2007-07-14 08:15:04Z ryandesign at macports.org $

PortSystem          1.0

name                mysql5
version             5.0.45
homepage            http://www.mysql.com/
categories          databases
platforms           darwin
maintainers         ryandesign

What is the "standard" procedure for either adding the option myself,  
or getting the option included in a portfile?

I don't necessarily want to hack on portfiles if there is a better way.

please pardon my ignorance. I do not use the GUI version of macports,  
so shell command advice is best.

Thanks.

8)
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Chris Janton  - face at CentosPrime dot COM
Netminder for Opus1.COM