Element.cpp's findAttrNodeInList() does case-insensitive comparison incorrectly.
Pull request: https://github.com/WebKit/WebKit/pull/21118
Pull request: https://github.com/WebKit/WebKit/pull/21124
Committed 271363@main (76c6ef3c49b0): <https://commits.webkit.org/271363@main> Reviewed commits have been landed. Closing PR #21124 and removing active labels.
<rdar://problem/119013600>