document it better

Author: TingDaoK

source/request_response.c

@@ -1036,16 +1036,17 @@ struct aws_http_message *aws_http2_message_new_from_http1(
         struct aws_byte_cursor lower_name_cursor = aws_byte_cursor_from_buf(&lower_name_buf);
         enum aws_http_header_name name_enum = aws_http_lowercase_str_to_header_name(lower_name_cursor);
         switch (name_enum) {
+            /**
+             * An intermediary transforming an HTTP/1.x message to HTTP/2 MUST remove connection-specific header
+             * fields as discussed in Section 7.6.1 of [HTTP]. (RFC=9113 8.2.2)
+             */
             case AWS_HTTP_HEADER_CONNECTION:
             case AWS_HTTP_HEADER_TRANSFER_ENCODING:
             case AWS_HTTP_HEADER_UPGRADE:
             case AWS_HTTP_HEADER_KEEP_ALIVE:
             case AWS_HTTP_HEADER_PROXY_CONNECTION:
+            /* Host has been converted to :authority pseudo header, skip it as well. */
             case AWS_HTTP_HEADER_HOST:
-                /**
-                 * An intermediary transforming an HTTP/1.x message to HTTP/2 MUST remove connection-specific header
-                 * fields as discussed in Section 7.6.1 of [HTTP]. (RFC=9113 8.2.2)
-                 */
                 AWS_LOGF_TRACE(
                     AWS_LS_HTTP_GENERAL,
                     "Skip connection-specific headers - \"%.*s\" ",