Continuation Frames in draft -04

Clarifications From Hamburg:

Continued HEADERS and PUSH_PROMISE frames MUST contained the same flags as
the initial frame with identical values.

I.e., if you send a HEADERS frame with the PRIORITY bit set, then all
CONTINUED frames must have the PRIORITY bit set AND MUST contain the same
value for priority.

As a note, a frame MUST NOT have a END_STREAM without a END_HEADERS flag --
this is to say a continued frame MAY have an additional flag (END_STREAM)
that the rest do not.

- Jeff