phpbb/phpbb — pull request #1862 by nickvergessen (2013-11-09 16:10:06+00:00)
Title: [ticket/11949] Do not prepend leading backslash to cache class name

The container seems to prepend the leading `\` itself, so we get an
`InvalidArgumentException with message '"'\\phpbb\\cache\\driver\\file'" is
not a valid class name for the "cache.driver" service.'`

http://tracker.phpbb.com/browse/PHPBB3-11949