fix watch file for sourceforge software

[Bluefuture <bluefuture@email.it>]

Hi,
if you want to fill a watch file or u want to fix your Dehs status[1]
please, for upstream software on sf.net doesn't use
http://prdownloads.sourceforge.net/.

For example egroupware:

version=2
http://prdownloads.sourceforge.net/egroupware/eGroupWare-(.*).tar.gz

But it is better (so it can really download package and also extract upstream changelog):

version=2
ftp://ftp.sf.net/pub/sourceforge/e/eg/egroupware/eGroupWare-(.*).tar.gz

Cheers

[1] http://qa.debian.org/developer.php