See https://stackoverflow.com/a/12142501
Notice : this option can affect consistency of data for MyISAM tables, such as Etherpad store.
But this will avoid a 30 min full lock of the service, and these inconsistencies will be nothing if we really need a backup to restore the database ; we can afford to lose a few revisions and we can also recover a pad content because of the duplications in the table. The consistency is not that important for a pseudo key-value store such as the one that Etherpad uses.

This reverts commit 21c1e819.

This should kill the container if there were errors on one of the 
"children" scripts, making it more obvious that there was a problem.

* replace tabs with spaces
* use a more standard format for 'for' loops