### Description
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Wrong information in the documentation. 1. Default value of the parameter default_checks is 2791. In the documentation it is said that default is 999. 2. One check is not described - SANITY_CHECK_DUPTAGS.
It was found in the version 4.4.7.
Closed #1542.
Looking at the codem I got the value 3047 for default_checks -- have I computed it wrong? I pushed a patch for it. SANITY_CHECK_DUPTAGS was already documented in the master branch, not sure about 4.4.x.