Logwatch to Event Console forwarding can be configured rule based

Removed global option logwatch_forward_to_ec, moved this to the
logwatch_ec ruleset. With this option the forwarding can now be
enabled for each logfile on a host
migrated wato ruleset registration syntax
Merge branch 'master' of mathias-kettner.de:check_mk
Merge branch 'master' of mathias-kettner.de:check_mk