A meta delivered CSP could contain invalid HTTP header value characters (for example, newlines). We should strip those characters out and store the CSP as a valid HTTP header for later inheritance.
<rdar://problem/103170891>
Pull request: https://github.com/WebKit/WebKit/pull/7860
Committed 258110@main (0445ac553799): <https://commits.webkit.org/258110@main> Reviewed commits have been landed. Closing PR #7860 and removing active labels.