Merge changes from the Perl side

This contains many changes from https://80x24.org/mwrap-perl.git
commit

* Built-in RCU-friendly version of dlmalloc, no more fragile dlsym(3m)
  resolution of malloc-family functions in the constructor

* Allocations are now backed by O_TMPFILE on $TMPDIR on modern Linux.
  Since mwrap increases memory usage greatly and I needed to use it
  on a system where I needed more VM space but lacked the ability
  to add swap.

* Configurable C backtrace level via MWRAP=bt:$DEPTH where $DEPTH
  is a non-negative integer.  Be careful about increasing it, even
  a depth of 3-4 can be orders-of-magnitude more expensive in
  time and space.  This can be changed dynamically at runtime via
  local HTTP (see below).

* Embedded per-process local-socket-only HTTP server obsoletes
  MwrapRack when combined with mwrap-rproxy from the Perl dist
  (set `MWRAP=socket_dir:/dir/of/sockets')
  See https://80x24.org/mwrap-perl/20221210015518.272576-4-e@80x24.org/
  for more info.

  It now supports downloading CSV (suitable for importing into sqlite 3.32.0+)

* License switched to GPL-3+ to be compatible with GNU binutils
  since we may take code from addr2line in the future.

* libxxhash supported if XXH3_64bits is available.

1 files changed, 0 insertions, 21 deletions

diff --git a/lib/Devel/Mwrap.pm b/lib/Devel/Mwrap.pm
deleted file mode 100644
index 2691802..0000000
--- a/lib/Devel/Mwrap.pm
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright (C) all contributors <mwrap-perl@80x24.org>
-# License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>
-package Devel::Mwrap;
-use v5.12;
-our $VERSION = '0.0.0';
-use XSLoader;
-XSLoader::load(__PACKAGE__, $VERSION);
-
-# allow using via the "-d:Mwrap" switch on the command-line:
-package # hide the package from the PAUSE indexer
-        DB;
-
-sub DB {} # noop, just keeps "-d:Mwrap" happy
-
-1;
-__END__
-=pod
-
-=head1 NAME
-
-Devel::Mwrap - LD_PRELOAD malloc wrapper + line stats for Perl