change old running scripts with rcNG

[Sergey Matveychuk]

Hello!

I've found rcNG-style scripts very convenient. I just set 
servicename_enable="YES" and port specific variable as 
servicename_opt="..." and I have not to rename 
PREFIX/etc/rc.d/script.sh-dist or like that.

What maintainers think to move to rcNG style scripts?
You can take a look at mail/p5-Mail-SpamAssassin port as an example.

I'd like to see this feature at least for squid, apache, dante, mysql, 
postgresql, snort, dhcpd etc. This is a reason I Bcc'ed them.

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Sem.