eth: when triggering a sync, check the head header TD, not block

This PR fixes issues in TableDatabase.

TableDatabase is a wrapper of underlying ethdb.Database with an additional prefix.
The prefix is applied to all entries it maintains. However when we try to retrieve entries
from it we don't handle the key properly. In theory the prefix should be truncated and
only user key is returned. But we don't do it in some cases, e.g. the iterator and batch
replayer created from it. So this PR is the fix to these issues.

This revision of go-duktype fixes the following warning

```
duk_logging.c: In function ‘duk__logger_prototype_log_shared’:
duk_logging.c:184:64: warning: ‘Z’ directive writing 1 byte into a region of size between 0 and 9 [-Wformat-overflow=]
  184 |  sprintf((char *) date_buf, "%04d-%02d-%02dT%02d:%02d:%02d.%03dZ",
      |                                                                ^
In file included from /usr/include/stdio.h:867,
                 from duk_logging.c:5:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:36:10: note: ‘__builtin___sprintf_chk’ output between 25 and 85 bytes into a destination of size 32
   36 |   return __builtin___sprintf_chk (__s, __USE_FORTIFY_LEVEL - 1,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   37 |       __bos (__s), __fmt, __va_arg_pack ());
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```

go.mod: update golang.org/x/crypto to fix a Go 1.14 race rejection

eth: fix transaction announce/broadcast goroutine leak

This is supposed to fix the occasional failures in 
TestCancel* on Travis CI.

Includes difficulty tests for EIP2384 aka MuirGlacier.

typo in func name in the comment

This was missing because I forgot to wrap it when bind.CallOpts.From
as added.

* les: separate peer into clientPeer and serverPeer

* les: address comments

This makes eth_call and eth_estimateGas use the zero address
as sender when the "from" parameter is not supplied.
Co-authored-by: Felix Lange <fjl@twurst.com>

eth/fetcher: remove randomness from test data

The new goja version supports the 'escape' and 'unescape' built-in functions.
This fixes #20693

params: update CHTs for the v1.9.11 release

This removes the error added in #20597 in favor of a log message at
error level. Failing to start broke a bunch of people's setups and is
probably not the right thing to do for this check.

This fixes a bunch of cases where a timeout in the test would leak
a goroutine.

This adds additional logic to re-resolve the root name of a tree when a
couple of leaf requests have failed. We need this change to avoid
getting into a failure state where leaf requests keep failing for half
an hour when the tree has been updated.

eth: don't enforce minimum broadcast, fix broadcast test

This event was added for the dashboard, but we don't need it anymore
since the dashboard is gone.