FIX: compiling, duplicate paths in selector, svn props

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6707 8aca7d54-2c30-db11-9de9-000461428c89
CHG: number of threads now selectable in simuconf.tab

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6708 8aca7d54-2c30-db11-9de9-000461428c89