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(In ) quick fixes #1529 - recovers more gracefully if glob() is disabled; installer can be run, and it will provide a warning.
Piwik will continue to run albeit in a crippled state:
(In ) refs #1529 - glob is critical for running updates; making this an installation blocker instead
(In ) refs #1529 - added/tested replacement glob() function; a missing glob() is still a warning