[SAC] another ongoing spam storm

[Sandro Santilli]

Spammers are back flooding trac, was the OSGeo Userid registration
form re-enabled ? Or these users must have been sitting there in wait
for a long time!

An updated list of offending accounts can be extracted from
the script I'm using to cleanup instances on trac.osgeo.org:

 grep '^(' /var/www/trac/emergency_clean.sql

Could someone please block/ban those users ?

--strk;