Changes to bsd.sites.mk

[Steve Wills]

> No objection from my side.

Thanks!

> You can use ports-mgmt/distilator to check a
> few port that use MASTER_SITE_RUBY and MASTER_SITE_XORG about the
> consistency of the distfiles.

Thanks, great idea.

Wasn't there somewhere that was running this on all ports regularly? If
so, where was it and could we potentially use that to test potential
changes to this file?

Steve