Removing unresponsive sites in bsd.sites.mk?

[cpghost]

Hello,

While doing 'portupgrade -a', I regulary experience problems while
fetching KDE distfiles from the first host in the MASTER_SITE_KDE list
(in /usr/ports/Mk/bsd.sites.mk), ftp.scarlet.be. This site apparently
stalls connections (instead of dropping them?), which slows down a
portupgrade -a with KDE components considerably. Removing the first
two entries from the MASTER_SITE_KDE list which point to ftp.scarlet.be
is a work-around that solves this problem.

Is there a more permanent way to drop this site without having to
manually edit bsd.sites.mk after every cvsup of the ports tree?
Some magic variable to set in /etc/rc.conf or so? Any idea?

Thanks,
-cpghost.

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