[JarryShaw]

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Summary

#1103 round 2: the files phase 1 left unread, plus the phase-1 reviewers' follow-ups.

protocol.rst:

• give ProtocolBase targets for every member Protocol documents, as
  grouped stubs linking to the Protocol entries, so the ProtocolBase.*
  references across the tree resolve; document its own
  init_subclass, and keywords and length_hint under Protocol
• drop the FRAME_LAYER_LIMIT versionremoved, a beta-only name, here and
  in protocol.py

Accuracy:

• register() names the public Protocol class, as ruled on fix(foundation): registrar error messages and type hints name the public class, not the Base the guard checks #1016: put
  back the wording docs(protocols): sweep application, misc and the protocol base (#1103) #1765 changed to ProtocolBase in protocol.py, PCAP
  and PCAP-NG
• HTTP/2 makers: the settings types accepted and the type check
  otherwise; sid_dep sets PRIORITY
• PCAP-NG: EPB timestamps are not in seconds; SPB's interface, timestamp
  and epoch are fixed; opt_endofopt and nrb_record_end are moved to the
  end, not ignored; NWK, not NKW
• PCAP ts_usec holds nanoseconds in a nanosecond-resolution file

Refs #1103

[JarryShaw]

Verdict: GOOD TO GO at e05a6a957. Sonnet review and re-check (author: Opus). The first review blocked on four removed versionadded lines in schema/misc/pcapng.py, now restored. The fix round also restored the register wording to Protocol (#1016), including the lines #1765 changed, and corrected the HTTP/2 settings Raises:. The AST guard is identical against the base, tests/project passes, and every added directive says 1.5.0.