clarification on optional informational response field

[mnot]

Comment by @fpalombini

Section 3.1:

That is, a known-length message consists of a framing indicator, a block of control data that is formatted according to the value of the framing indicator, a header section with a length prefix, binary content with a length prefix, and a trailer section with a length prefix.

Section 3.2:

That is, an indeterminate length consists of a framing indicator, a block of control data that is formatted according to the value of the framing indicator, a header section that is terminated by a zero value, any number of non-zero-length chunks of binary content, a zero value, and a trailer section that is terminated by a zero value.

At this point in the text I thought this was missing the optional Informational response field, but you say explain that several paragraph later. Maybe clarify here that this is for messages that are not responses containing informational status codes, or move those paragraphs closer together?