Add static filter parser checklist

To be used to validate the static filtering parser code in
uBO. Over time I expect that all theparsing will be done
by the static filtering parser, and thus the list here will
become useful to detect breaking code changes.

docs/tests/static-filtering-parser-checklist.txt

@@ -0,0 +1,45 @@
+! Title: Static Filtering Parser Checklist
+! Homepage: https://github.com/gorhill/uBlock
+! Licence: https://github.com/gorhill/uBlock/blob/master/LICENSE.txt
+!
+! Description:
+! To verify that the static filtering parser is properly parsing valid and
+! invalid cases, by typically adding the list to uBO, disabling the list,
+! and viewing it in uBO's asset viewer.
+!
+! Feel free to add more entries to more throughly validate the static
+! filtering parser, submit the changes in your fork of uBO by opening an
+! issue at https://github.com/uBlockOrigin/uBlock-issues/issues
+
+
+
+
+!-----------------------
+! Parsing should succeed
+!-----------------------
+$script,redirect=noop.js
+*$empty
+*$xhr,empty
+*$redirect=empty
+*$xhr,redirect=empty
+
+
+
+
+!--------------------
+! Parsing should fail
+!--------------------
+
+! can't redirect without type (except to `empty`)
+*$redirect=noop.js
+
+! can't redirect beacon, ping, websocket
+*$beacon,redirect-rule=empty
+*$ping,redirect-rule=empty
+*$websocket,redirect-rule=empty
+
+! can't mix csp with other types or redirect directives
+*$csp=default-src 'none',empty
+*$csp=default-src 'none',redirect=empty
+*$csp=default-src 'none',redirect=empty
+*$csp=default-src 'none',xhr