Support of pseudo-headers was removed as unused, but mention of it
in the description remains and disrupt the numbering in comment, which
can be confusing.
* - 0000 = request start-line
* - 0001 = response start-line
* - 0010 = header
- * - 0011 = pseudo-header ou "special" header
- * - 0100 = end-of-headers
- * - 0101 = data
- * - 0110 = trailer
- * - 0111 = end-of-trailers
+ * - 0011 = end-of-headers
+ * - 0100 = data
+ * - 0101 = trailer
+ * - 0110 = end-of-trailers
* ...
* - 1111 = unused
*