BOM takes precedence over HTTP #2777
Description
From https://lists.w3.org/Archives/Public/www-style/2012Oct/0727.html:
- RESOLVED: BOM takes precedence over HTTP. Errata CSS2.1, edit css3-syntax to fix this.
CSS 2.1 errata: https://www.w3.org/Style/css2-updates/REC-CSS2-20110607-errata.html#s.4.4
Note this errata led @dbaron to file #992 as it apparently doesn't match the resolution or level 3.
Note this section is becoming informative per WG resolution (#2224 (comment)).