Fix h2spec 4.2. Frame Size

[georgeu2000]

Previous secure server results:

73 tests, 33 passed, 0 skipped, 40 failed

4.2. Frame Size
    × Sends large size frame that exceeds the SETTINGS_MAX_FRAME_SIZE
      - The endpoint MUST send a FRAME_SIZE_ERROR error.
        Expected: GOAWAY frame (ErrorCode: FRAME_SIZE_ERROR)
                  RST_STREAM frame (ErrorCode: FRAME_SIZE_ERROR)
                  Connection close
          Actual: HEADERS frame (Length: 14, Flags: 4)

New secure server results:

73 tests, 34 passed, 0 skipped, 39 failed

4.2. Frame Size
    ✓ Sends large size frame that exceeds the SETTINGS_MAX_FRAME_SIZE

[coveralls]

Coverage increased (+0.001%) to 96.936% when pulling aee2e30 on georgeu2000:h2spec-4-2-frame-size into 99c7590 on igrigorik:master.

[igrigorik]

👍