dtrace.t: Don’t rely on installed strict.pm

It was failing to load strict.pm if perl had not been installed yet.
Remove the unused env parameter from a2p's main, and the associated pragma.

a2p's main has had the traditional Unix third parameter (env) forever.
Commit 24801a4b9a14a562 in May 2005 increased the strictness of the Tru64
compiler, and added pramgas where necessary to counter its warnings.
However, a2p's main doesn't actually *use* the env parameter, so a better
solution is to remove it. Which means that the pragma can be removed too.
make some tests TODO under -DPERL_NO_COW

Since it's Copy-on-Write that fixed those tests, we expect them to fail
without COW.
require.t: handle parallel runs

There are random smoke failures in this test script, which are consistent
with multiple processes running the same test script in parallel, and
writing/unlinking the same (hard-coded) temp files.

As a temp hack, add a sleep(20) if this looks like its happening,
and see if the smoke issues go away.
use 'env' instead of 'echo' for %ENV tests in magic.t

To prevent using weird echo commands (it can be a binary in the $PATH)
or shell quoting (Windows has env too?), use the env command.

The env command showed perfect content on old HP-UX 11.00 where the echo
command usage got it seriously wrong.
Update CPAN-Meta to CPAN version 2.131560

  [DELTA]

2.131560  2013-06-05 15:26:36 America/New_York

  [DOCUMENTATION]

  - Replaced CPAN::Meta SYNOPSIS with code that actually works
perldelta: typo
perldelta for #114576 (XS lvalue subs)
Don’t leak the /(?[])/ parsing stack on error

Instead of creating the parsing stack and then freeing it after pars-
ing the (?[...]) construct (leaking it whenever one of the various
errors scattered throughout the parsing code occurs), mortalise it to
begin with and let the mortals stack take care of it.
In S_regatom, declare parse_start when RE_TRACK_PATTERN_OFFSETS is defined.

Commit 779fedd7c3021f01 (March 2013) moved code which unconditionally used
parse_start into another block. Hence the variable is now only needed when
RE_TRACK_PATTERN_OFFSETS is defined, so wrap its declaration in #ifdef/#endif
to avoid C compiler warnings.
In regcomp.c, Set_Node_Cur_Length() uses parse_start, so explicitly pass it.

The macro Set_Node_Cur_Length() had been referring to the variable
parse_start within its body. This somewhat secret reference is potentially
risky, as it was always taking a parameter node, hence one might assume that
that was all that it used, and change the value stored in parse_start.
(Specifically, one place that assigns RExC_parse - 1 to parse_start, and later
uses parse_start + 1, which looks like an obvious cleanup candidate)

So make parse_start an explicit parameter.

Also, eliminate the never-used macro Set_Cur_Node_Length. This was added as
part of commit fac927409d5ddf11 (April 2001) but never used.
Alphabetize perltrap

Before 9b12f83b0b6, the programming languages other than Perl were in
alphabetical order.
diag.t: Remove commented obsoleted by 62f5f54dc2d
diag.t: Don’t confuse the two exception listse

The second exception list is for things listed in perldiag whose cate-
gories are in need of correction or are too baffling for diag.t to
check correctly (it’s not very smart).

Due to my careless implementation in commit 62f5f54d, the second list
was also treated effectively as an addendum to the first.  Things not
listed in perldiag could be listed in the second exception list and
make tests pass.
perldiag: Correct severity/category for ‘False [] range’

This can now be a fatal error or a warning.  diag.t is still not
smart enough to verify this, so it is still in its exception list.
Merge remote-tracking branch 'remotes/origin/smoke-me/env-instead-of-echo' into blead