Update perlfaq to version 5.015046
perldelta entry for update to perlfaq
Add blank line after =item
More perldelta work
Remove unused stubs and editing notes from perldelta.
Update Stevan Little's email address
perldelta: Typo, clarification
perlvar: Note a deprecation
Another perldelta entry
Replace "message" with the actual message.

Otherwise, the formatted delta will just list "message" when listing
new errors, instead of the actual messages.
An error cannot be both new, and reworded.
Fix spelling in perldelta

Using ispell. Ispell does complain about "Acknowledgements", suggesting
"Acknowledgments", but Merriam-Webster recognizes "Acknowledgements" as
a valid variation.
perldelta: Mention that IRIX and Tru64 are regained platforms.
perldelta: Update the Inf and Nan entry.

jhi says properly explaining the long-double and double-double requires
much more detail, so he suggested dropping mentioning it.
Fix crash with ‘join,’ caused by 987c96916
IRIX: fsync documented to fail on read-only filehandles.
/tmp can have (low) quotas on the number of files.

/tmp, or wherever tempdir happens.

Happened in IRIX, but applicable anywhere.
regcomp.c: struct scan_frame: rename members for clarity

Rename some members of scan_frame so it is easier to understand what
they are for, in preparation for adding some more members.
regcomp.c: reuse temporary debugging temp sv's

For dumping regex debug state we need some temporary SV's on hand
to pass into regprop() which writes into an SV to do it's thing.
Allocating a new mortal SV every time we want to do this is very
wasteful, and manifests as a "leak" in very long compiles such as
when debugging issues like RT #122283.

By storing the SV's in RExC_state_t we can reuse them during the
compilation process and avoid leaking memory for nothing.
regcomp.c: eliminate memory leak from GOSUB/GOSTART regops

We can reuse previously allocated frames and avoid blowing
up memory during regex compile of complex recursive patterns.

A pattern like that reported in RT #122283 would chew up all
avaiable memory allocating new frames each time it recursed.