'''Short description'''

May be we should add "Do you want yet to clean your cache Y/N (Y): " to the migration script 
and if Y clean the cache.

We can check in 1.8/1.9 if the wiki process is stopped and tell to do it otherwise it does not clean the cache.

The patch also tests in the migration script if the wikiserver is offline.

{{attachment:script.patch}}

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CategoryFeatureRequest CategoryFeaturePatched