* t:
  go/neo/t/neotest: Use python -c 'print ...' in a way that works on both py2 and py3
  go/neo/t/tzodb.py: Fix zhash for Python3

* master:
  go/neo/t/neotest: Use python -c 'print ...' in a way that works on both py2 and py3
  go/neo/t/tzodb.py: Fix zhash for Python3

Without parenthesis it was failing on py3:

	(neo) (py3.venv) (g.env) kirr@deca:~/src/neo/src/lab.nexedi.com/kirr/neo/go/neo/t$ ./neotest info-local
	date:   Wed, 18 May 2022 11:05:50 +0300
	xnode:  kirr@deca.navytux.spb.ru (2401:5180:0:af::1 192.168.0.3 (+ 1·ipv4))
	uname:  Linux deca 5.10.0-13-amd64 #1 SMP Debian 5.10.106-1 (2022-03-17) x86_64 GNU/Linux
	cpu:    Intel(R) Core(TM) i7-7600U CPU @ 2.80GHz
	  File "<string>", line 1
	    print '%.2fGHz' % (400000 / 1E6)
	          ^
	SyntaxError: invalid syntax

On py3 dict.keys() returns iterator instead of list:

    $ ./tzodb.py zhash
    Traceback (most recent call last):
      File "/home/kirr/src/neo/src/lab.nexedi.com/kirr/neo/go/neo/t/./tzodb.py", line 141, in <module>
        main()
      File "/home/kirr/src/neo/src/lab.nexedi.com/kirr/neo/go/neo/t/./tzodb.py", line 138, in main
        zhash()
      File "/home/kirr/src/neo/src/lab.nexedi.com/kirr/neo/go/neo/t/./tzodb.py", line 59, in zhash
        optv, argv = getopt(sys.argv[2:], "h", ["help", "check=", "bench="] + hashRegistry.keys())
    TypeError: can only concatenate list (not "dict_keys") to list

* t:
  go/internal/xurl: New package (draft)
  X go.mod: v↑ go123

* master:
  go/internal/xurl: New package (draft)

With xurl.ParseQuery being simpler analog of url.ParseQuery.
Simpler: It returns regular map instead of url.Values by not allowing duplicates.

Instead of requiring users to explicitly mark their tests as finished in
particular subject-to-deadlock places, tracetest was fixed to
unconditionally detect "extra sends" deadlocks automatically:

kirr/go123@3b19f68c

* t:
  .
  .

* t: (129 commits)
  X go.mod: v↑ *
  go/zodb/btree: Change V<op> family to also provide visited node key coverage on visit callback
  go/zodb/btree: Add KeyRange type
  go/zodb/btree: Introduce constants for min/max key value
  go/zodb/btree: tests: Don't forget to close storage
  go/zodb/btree: Cosmetics
  .
  .
  .
  .
  .
  .
  .
  X Start reworking BTree to provide keycov on visit callback
  X go/neo: Fix credentials parsing with go1.17
  fixup! Y client: Fix URI scheme to move credentials out of query
  go/internal/xtesting: Add missing X
  go/zodb/{fs1,zeo}: ~staticcheck
  go/zodb/btree: Fix missing return on data-consistency error
  go/zodb, go/zodb/btree: Fix go generate after rename on zodbtools side
  ...

go get: upgraded github.com/fsnotify/fsnotify v1.4.10-0.20200417215612-7f4cf4dd2b52 => v1.5.1
go get: upgraded github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b => v1.0.0
go get: upgraded github.com/gwenn/gosqlite v0.0.0-20201008200117-82e079acf5b6 => v0.0.0-20211101095637-b18efb2e44c8
go get: upgraded github.com/gwenn/yacr v0.0.0-20200112083327-bbe82c1f4d60 => v0.0.0-20211101095056-492fb0c571bc
go get: upgraded github.com/kisielk/og-rek v1.1.0 => v1.2.0
go get: upgraded github.com/soheilhy/cmux v0.1.5-0.20210205191134-5ec6847320e5 => v0.1.5
go get: upgraded github.com/tinylib/msgp v1.1.5 => v1.1.6
go get: upgraded golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 => v0.0.0-20211111160137-58aab5ef257a
go get: upgraded golang.org/x/sys v0.0.0-20210301091718-77cc2087c03b => v0.0.0-20211111213525-f221eed1c01e
go get: upgraded golang.org/x/text v0.3.5 => v0.3.7
go get: upgraded lab.nexedi.com/kirr/go123 v0.0.0-20210128150852-c20e95f0f789 => v0.0.0-20210906140734-c9eb28d9e408

Highlights:

- og-rek brings support for pickle protocol 5
- go123  brings in support for Go1.17

* master:
  go/zodb/btree: Change V<op> family to also provide visited node key coverage on visit callback
  go/zodb/btree: Add KeyRange type
  go/zodb/btree: Introduce constants for min/max key value
  go/zodb/btree: tests: Don't forget to close storage
  go/zodb/btree: Cosmetics

WCFS needs to know key coverage for every visited node.

WARNING: this is API change.

KeyRange represents [lo,hi) key range. It simplifies working with ranges
of keys. We will use it in the next commit.

KeyRange originated in WCFS and was copied from there:

https://lab.nexedi.com/kirr/wendelin.core/blob/57be0126/wcfs/internal/xbtree/blib/keyrange.go

We were already using math.Min<Key> in one place, but the number of such
places is going to increase. -> Keep min/max definition in only one place.

NOTE: db was already being closed in the test's code.

* t+btree:
  .
  .
  .
  .
  .
  .
  .
  X Start reworking BTree to provide keycov on visit callback

Due to security concerns, go1.17, even though very reluctantly,
similarly to Python broke backward compatibility and stopped to treat ';'
as separator when parsing URL queries.

We still want to accept ';' as separator in credential part.
-> Work it around by replacing ';' -> to '&'.

See https://golang.org/doc/go1.17#semicolons and https://github.com/golang/go/issues/25192 for context.

See also: cf685fb5 (fixup! Y client: Fix URI scheme to move credentials out of query)

parse_qsl no longer treats ';' as valid query separator for security
reason because most proxies did not do so and it was possible to poison
proxy cache due to difference in query separator handling (see bugs.python.org/issue42967).

To handle credentials we don't have any proxy here, and it is still
perfectly valid to use ';' as credentials separator.

-> Fix it with ';' -> '&' replace workaround, before feeding credentials
string to parse_qsl.

Amends: b9a42957.

* master:
  go/internal/xtesting: Add missing X
  go/zodb/{fs1,zeo}: ~staticcheck
  go/zodb/btree: Fix missing return on data-consistency error
  go/zodb, go/zodb/btree: Fix go generate after rename on zodbtools side

staticcheck says:

	xtesting.go:386:2: this value of err is never used (SA4006)

fs1/format.go:204:2: only the first constant in this group has an explicit type (SA9004)
zeo/proto.go:56:2: only the first constant in this group has an explicit type (SA9004)

staticcheck reports

    ziobtree.go:606:4: Errorf is a pure function but its return value is ignored (SA4017)
    ziobtree.go:626:4: Errorf is a pure function but its return value is ignored (SA4017)
    zlobtree.go:606:4: Errorf is a pure function but its return value is ignored (SA4017)
    zlobtree.go:626:4: Errorf is a pure function but its return value is ignored (SA4017)

run_with_zodb3py2_compat was renamed to run_with_zodb4py2_compat in
nexedi/zodbtools@c59a54ca .

Without the fix go genrate was failing as

    (neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/lab.nexedi.com/kirr/neo/go/zodb/btree$ go generate
    Traceback (most recent call last):
      File "./testdata/gen-testdata", line 26, in <module>
        from zodbtools.test.gen_testdata import run_with_zodb3py2_compat
    ImportError: cannot import name run_with_zodb3py2_compat

and

    (neo) (z-dev) (g.env) kirr@deca:~/src/neo/src/lab.nexedi.com/kirr/neo/go/zodb$ go generate
    Traceback (most recent call last):
      File "./py/pydata-gen-testdata", line 24, in <module>
        from zodbtools.test.gen_testdata import run_with_zodb3py2_compat
    ImportError: cannot import name run_with_zodb3py2_compat

This amends commit fc69e00d (go/zodb/fs1: Fix Python database generator
to work with recent zodbtools).

* master:
  go/zodb: Fix ΔTail.LastRevOf based on WCFS experience

- the only valid range for at is [tail, head]. Don't try to return anything
  meaningful for queries outside of this range and just panic instead. This is
  consistent with SliceByRev, which also panics on invalid query, and it is also
  consistent with semantic model that ΔTail is a vector with data keyed by tid in
  range (tail, head]: if key is out of vector range, access to the vector should
  panic, isn't it?

- instead of returning revision of minimum entry on exact=n, always
  return (tail, exact=n) in that case.

The change in behaviour is consistent with ΔFtail and ΔBtail from WCFS
and is needed for ΔFtail to function correctly:

https://lab.nexedi.com/kirr/wendelin.core/blob/22f5f096/wcfs/internal/xbtree/δbtail.go
https://lab.nexedi.com/kirr/wendelin.core/blob/22f5f096/wcfs/internal/zdata/δftail.go