FIX: do not produce fatal errors if way-object of tunnels is not available

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6245 8aca7d54-2c30-db11-9de9-000461428c89
Release of makeobj 55.1 for simutrans 112.1

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6246 8aca7d54-2c30-db11-9de9-000461428c89
back to nightly mode

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6247 8aca7d54-2c30-db11-9de9-000461428c89
FIX: do not log important messages to stdout twice

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6248 8aca7d54-2c30-db11-9de9-000461428c89
sqapi: add methods to send messages to players

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6249 8aca7d54-2c30-db11-9de9-000461428c89
sqapi: add method to clear all forbid-tool rules

git-svn-id: svn://tron.homeunix.org/simutrans/simutrans/trunk@6250 8aca7d54-2c30-db11-9de9-000461428c89