Sync ORelay from moxygen relay (21c3597..b426e6c6); add sync-relay.sh

[afrind]

Brings ORelay up to date with 9 upstream moxygen commits:

• NamespaceSubscriberInfo struct (forward, options, namespacePublishHandle, trackNamespacePrefix) replacing bare bool in sessions map
• Draft 16+ bidi stream support in publishNamespace/publishNamespaceDone
• trackStatus method (forward to upstream or answer from local forwarder)
• publishToSession: remove PublishRequest param
• subscribeNamespace: allow empty prefix for draft 16+; store full NamespaceSubscriberInfo; draft 16+ namespace message path
• subscribe/publish: setExtensions replacing setGroupOrder/delivery timeout
• Remove MoQTrackProperties.h include
• 523 new test lines covering all new functionality

scripts/sync-relay.sh automates future syncs: copies MoQRelay.h/.cpp and MoQRelayTest.cpp from deps/moxygen, applies name/namespace transforms (MoQRelay→ORelay, namespace moxygen→openmoq::o_rly, moxygen:: qualifiers in header, using namespace moxygen in .cpp), formats, builds, and tests.

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This change is 

[michalhosna]

@michalhosna reviewed 4 files and all commit messages, and made 2 comments.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on afrind).

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-- commits line 21 at r1:
The script should have its own commit. If I understand it correctly, that script is not synced from upstream.

It will make the attribution (git blame) easier to track down in the history.

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scripts/sync-relay.sh line 218 at r1 (raw file):

fi

echo "==> Done"

It looks fragile to me, but we will see over time.

[michalhosna]

@michalhosna made 1 comment.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on afrind).

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scripts/sync-relay.sh line 218 at r1 (raw file):

Previously, michalhosna (Michal Hošna) wrote…

It looks fragile to me, but we will see over time.

EDIT: The script look fragile, to be clear

[afrind]

@afrind made 2 comments.
Reviewable status: all files reviewed (commit messages unreviewed), 2 unresolved discussions (waiting on michalhosna).

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-- commits line 21 at r1:

Previously, michalhosna (Michal Hošna) wrote…

The script should have its own commit. If I understand it correctly, that script is not synced from upstream.

It will make the attribution (git blame) easier to track down in the history.

fixed

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scripts/sync-relay.sh line 218 at r1 (raw file):

Previously, michalhosna (Michal Hošna) wrote…

EDIT: The script look fragile, to be clear

It's not intended for long term. We're going to diverge pretty soon.

[afrind]

@afrind resolved 2 discussions.
Reviewable status: all files reviewed (commit messages unreviewed), all discussions resolved (waiting on afrind).