Log Message:
www/drupal7: update to 7.78

Drupal 7.78, 2021-01-19
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- Fixed security issues:
   - SA-CORE-2021-001

Drupal 7.77, 2020-12-03
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- Hotfix for schema.prefixed tables

Drupal 7.76, 2020-12-02
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- Support for MySQL 8
- Core tests pass in SQLite
- Better user flood control logging