Add NOT_VALIDATE hint

Author: AdamWr

docs/general/ad-filtering/create-own-filters.md

@@ -4928,6 +4928,17 @@ Except for AdGuard for Safari, AdGuard Content Blocker, and AdGuard for iOS, thi
 ||example.org^
 ```
 
+#### `NOT_VALIDATE`
+
+This hint is used to skip validation of the rule. It is useful for rules for which support has not yet been added to the filters compiler, or for rules that are incorrectly discarded.
+
+**If you want to add a rule which should not be validated use the `NOT_VALIDATE` hint:**
+
+```adblock
+!+ NOT_VALIDATE
+||example.org^$newmodifier
+```
+
 ## How to debug filtering rules
 
 It may be possible to create simple filtering rules "in your head" but for anything even slightly more complicated you will need additional tools to debug and iterate them. There are tools to assist you with that. You can use DevTools in Chrome and its analogs in other browsers but most AdGuard products provide another one — Filtering log.