Integrate:

Integrate:
[ 24533]
add access to Perl_croak() via 'mycroak' in XS::APItest

[ 24827]
Croak if an attempt is made to modify PL_strtab
(er, TODO - these should be in perldiag)

[ 25070]
Tests for hv_delayfree_ent and hv_free_ent

[ 25072]
Implement hv_delayfree_ent in terms of hv_free_ent

[ 25074]
Perl_share_hek needs exporting for change 25070 on Win32

[ 25075]
Use void, not void *, to suppress RETVAL (and compiler warning)

[ 25078]
Make the tests for hv_free_ent and hv_delayfree_ent pass under
-DPURIFY too.
p4raw-link: @25078 on //depot/perl: 8afd2d2ecb560202b631f95a6aff50e34dd49052
p4raw-link: @25075 on //depot/perl: 439efdfe48fa281a153e59516738da390f7cc558
p4raw-link: @25074 on //depot/perl: 063497e10fc528b1992837d48410189d2aea4e71
p4raw-link: @25072 on //depot/perl: bc4947fc50de6fbc73da20992537e1ebc727d9c8
p4raw-link: @25070 on //depot/perl: 2dc92170b2dd9e41c48e775084065721dadbc042
p4raw-link: @24827 on //depot/perl: 5d2b148555a8ecf68ab82784915f0877e3c9783a
p4raw-link: @24533 on //depot/perl: ef469b0369ad36d7b41ff4e3416ffb34105b3bef

p4raw-id: //depot/maint-5.8/perl@25481
p4raw-branched: from //depot/perl@25479 'branch in'
	ext/XS/APItest/t/exception.t (@23911..)
p4raw-integrated: from //depot/perl@25075 'edit in'
	ext/XS/APItest/APItest.xs (@25070..)
p4raw-integrated: from //depot/perl@25074 'merge in' global.sym
	(@25061..) embed.h (@25066..) embed.fnc (@25067..)
p4raw-integrated: from //depot/perl@25072 'merge in' hv.c (@25066..)
p4raw-integrated: from //depot/perl@24827 'edit in'
	ext/XS/APItest/APItest.pm (@24533..)