indexer skips downloading and parsing the documents with
URL matching the given patterns.
Every time a matching document expires and appears in the crawler queue,
indexer just marks the document
as fresh again by modifying
its next_index_time value according
to Period settings.
Word and section information about the document remains untouched.
The meaning of the first three optional parameters
is exactly the same as in the Allow command.
can be useful for excluding sites from revisiting,
for example, when the sites are temporarily not available.
It's possible to use multiple patterns in
the same Skip command.
Skip takes global effect for the entire
configuration file and can be used