Log Message:
www/contao45: update to 4.5.6

Contao 4.5.5 is available			2018/03/06 11:04 by Leo Feyer

Contao version 4.5.5 is available. The bugfix release fixes problems with
using InnoDB without the innodb_large_prefix option.

Contao 4.5.6 is available			2018/03/06 15:53 by Leo Feyer

Contao version 4.5.6 is available. The bugfix release fixes a problem with new
installations with InnoDB without large prefixes.