Feature Request: Blacklist for statistical data

[christianbltr]

Some instances suffer from spammers trying to inject code or spam via the search form.

These search requests are then saved to the statistic table of ke_search and pollute the date which makes more difficult to find "real" search requests.

Additionally in ke_search_premium these search requests may appear as proposals in the autocomplete feature which is irritating for the user.

Idea:

Implement a "blacklist" feature which checks search requests and skips the writing to the statistic table if the search requests contains certain characters (like single quotes or pipes) or words (common spam words, or words used in code injection attempts, like "dbms_pipe").