Catalog: the LAN redirect, the release check, and the update job's lease leave

Three catalog tests leave for the host proofs that carry them; the
catalog goes from 95 to 92.

- setup.https-only-writes, for forgectrl's tests/host_lan.sh (13273a0):
  from a LAN peer in a network namespace, reads served over HTTPS and
  HTTP, three writes over HTTP each a 302 to the same path on HTTPS that
  acts on nothing, the same write served from loopback, and the token
  writing over HTTPS with no account.
- update.release-check and update.job-locks, together, for forgectrl's
  tests/host_update.sh (acc3dcf), against a release server of its own:
  GET /update/release's keys, POST /update/check with a v<semver> tag, a
  size above 0, notes and new; the dismissal refused for a version that
  is not a tag, taken for the tag, cleared by an empty one; and a probe
  download that holds the machine (a settings write and a G21 job each
  409 in the job's name, update:download of kind system the holder),
  ends refused by the signature check leaving no file, and lets the same
  settings write through after.

update.release-check was the last test in suite/update.py; _VERSION_RX
and the re import, which only it used, go with it. update.job-locks was
the only test in suite/updlock.py: the module and its import in
suite/__init__.py go. setup.https-only-writes was the only test of
setup.py's "HTTPS boundary" section. tests/test_setup_suite.py drops its
id.

update.product-gate stays: fwup is on neither this host's PATH nor CI's,
so host_update.sh does not prove the five uploads, and no HOST_TESTED
row is added for src/fwproduct.*. No other HOST_TESTED row either.

test_setup_suite.py passes (31 tests). The coverage lint on the tree
manifest finds no uncovered path and no host-tested row problem across
the 92 tests; its one finding is setup.check-lens's empty src/lensfind.*
entry. pyflakes reports only the unused local plain in
update.slots-and-signature, which HEAD already has. The full forgetest
suite was not run.

Fingerprints: setup.py's and update.py's shared text move, so 33 tests
move: the 6 left in setup.py, the 25 in the modules that read it, and
update.slots-and-signature and update.product-gate. The pending pin bump
from c274f19 already owes 31 of them; setup.machine-name and
exthost.platform are the two it adds, as before. releases/ and
TEST-AUDIT.md are unchanged.

forgetest/tests/test_setup_suite.py

@@ -17,7 +17,7 @@ import helpers
 from forgetest import baseline, catalog
 from forgetest.suite import setup
 
-IDS = ("setup.account-login", "setup.https-only-writes",
+IDS = ("setup.account-login",
        "setup.ssh-until-reboot", "setup.machine-name", "setup.first-run-flow",
        "setup.first-run-page",
        "setup.mirror")