This reverts commit 8e920bd341e241f50a74dbf8aa343319f204e200.
Also skip the tests in t/op/blocks.t
RT #132863
8e920bd341 sets the PERL_EXIT_DESTRUCT_END flag on non-UNIXy platforms,
like is already done on UNIXy platforms. This makes things like
BEGIN { exit(1) } call END blocks on those platforms (like they already
do on UNIX).
But it caused problems with win32 pseudo-forks, so revert for 5.28
and re-address the issues sometime later.
The new tests in commit 503bc07b4b9e34ed04a725b2bc8faec1ae0f3be2
showed up platform differences in whether END blocks get run.
Set PERL_EXIT_DESTRUCT_END in all embeddings to make this consistent.
Some platform-specific embeddings of perl were misusing the
return values from perl_parse() and perl_run(), in some cases
causing failure due to exit(0) combined with the recent changes
in commit 0301e899536a22752f40481d8a1d141b7a7dda82. Commit
d4a50999a5525c2681d59cae5fcd94f94ff897fd partially fixed a Windows
embedding. More fully fix that, along with NetWare and OS/2. Even in
embeddings with correct logic, stop using a variable named "exitstatus"
to hold the result of perl_parse() or perl_run(), to avoid misleading
people who copy the code.
For the default (non-multiplicity) configuration, PERLVAR*() macros now
directly expand their arguments to tokens such as C<PL_defgv>, instead of
expanding to C<PL_Idefgv>. This removes over 350 lines from F<embedvar.h>,
which defined macros to map from C<PL_Idefgv> to C<PL_defgv> and so forth.
