add some tests for Perl #71922

Apparently this is fixed now. But add tests
Fix Perl version references in INSTALL

Also update the RMG to remind people to do this for the "late" bumps in
BLEAD-POINT and BLEAD-FINAL releases
portport: remove DG/UX
update Module::CoreList for v5.19.1 release
update perlhist for v5.19.1
finalize perldelta.pod for v5.19.1
add cpan/autodie/t/truncate_me to makerel @writables list
Porting/epigraphs.pod: add v5.19.1 and v5.19.0 epigraphs
new perldelta
bump version to v5.19.2
stub Module::CoreList for v5.19.2
Benchmark.t: fix skip() argument order
Porting/epigraphs.pod: add link to release announcement
Revert "portport: remove DG/UX"

This reverts commit 28371e3dbee6234e13f1dfa4afb650ba7691ebfc.
perldiag: Document ‘Can't call mro_method_changed_in()’
optree_constants.t: Correct line number in comment

Why we need a reference like this is beyond me, but it is extremely
fragile, because even cosmetic changes to gv.t will throw it off.
That said, at least the next person looking at it won’t be as puzzled
as I was (until the next gv.t change).
[perl #118305] make dtrace sub-entry probe support lexsubs

No tests, because I don’t know how to write them.

See also <https://rt.perl.org/rt3/Ticket/Display.html?id=118305#txn-1221543>.

I have tested this manually, so I know it works and no longer crashes.

Hopefully someone else can follow this up with tests.
Improved struct pmop alignment fix - avoid the slow path on 64 bit systems.

Commit c2a50ddb1bed6576 works round an alignment bug in the slab allocator
for 32 bit systems built with 64 bit IVs. However, the C pre-processor logic
meant that the test path was enabled on true 64 bit systems. It's not needed
there, so improve the logic so that it isn't compiled for platforms where
pointers are 64 bit.
release_managers_guide.pod: amended based on v5.19.1 experience
PATCH [perl #118563]: Fix perldata ident defn

The formal definition of identifiers was missing the fact that every
character in an identifier must match \w.  This also adds some
explanation.