Ftw.solr

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- Patch reindexObjectSecurity to optimize indexing of large trees.
[lgraf]

- Fix diff for items with a modification date that has no fractional seconds.
[buchi]

- Provide an error message when raising an AttributeError in SolrDocument.
[buchi]

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- Add option to synchronize Solr with catalog in maintenance view.
[buchi]

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- Set Content-Type 'application/x-www-form-urlencoded' for requests to
/update/extract endpoint to ensure compatibility with Solr 7.3.
[lgraf]

- Maintenance view: Allow reindexing without dooming the transaction.
[lgraf]

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- Make sure we do not pass invalid dates to Solr.
[buchi]

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- Declare dependency on plone.namedfile[blobs].
[lgraf]

- Add diff function to maintenance view to compare UIDs in portal catalog with
UIDs in Solr.
[buchi]

- Fix security filter: Properly quote roles/users with spaces.
[buchi]

- Add option to reindex Solr from a catalog query.
[buchi]

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- Complete rewrite. Not compatible with previous versions.
[buchi]