[PATCH v2] drop redundant calls to DS->Reset

[Eric Wong <e@80x24.org>]

Reset gets called on END{} anyways to workaround DBI lifetime
problems, so there's no need to call it near exit.  We can't
replace calls to POSIX::_exit with `exit' to force END{} to
run just yet, as there are still some lingering destruction
ordering problems on newer DBI and or Perls.
---
 Dropping POSIX::_exit was too aggressive and caused segfaults
 on my FreeBSD 13.2 VM.

 lib/PublicInbox/CodeSearchIdx.pm | 1 -
 lib/PublicInbox/Daemon.pm        | 1 -
 lib/PublicInbox/IO.pm            | 6 ++----
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/lib/PublicInbox/CodeSearchIdx.pm b/lib/PublicInbox/CodeSearchIdx.pm
index 3764f13e..bb1d698b 100644
--- a/lib/PublicInbox/CodeSearchIdx.pm
+++ b/lib/PublicInbox/CodeSearchIdx.pm
@@ -1292,7 +1292,6 @@ sub cidx_run { # main entry point
 
 	local @PublicInbox::DS::post_loop_do = (\&shards_active);
 	PublicInbox::DS::event_loop($MY_SIG, $SIGSET);
-	PublicInbox::DS->Reset;
 	$self->lock_release(!!$NCHANGE);
 	show_json($self);
 }
diff --git a/lib/PublicInbox/Daemon.pm b/lib/PublicInbox/Daemon.pm
index f33f6f17..a2c1ed6e 100644
--- a/lib/PublicInbox/Daemon.pm
+++ b/lib/PublicInbox/Daemon.pm
@@ -703,7 +703,6 @@ sub run {
 	local %POST_ACCEPT;
 
 	daemon_loop();
-	PublicInbox::DS->Reset;
 	# ->DESTROY runs when $for_destroy goes out-of-scope
 }
 
diff --git a/lib/PublicInbox/IO.pm b/lib/PublicInbox/IO.pm
index 6593dcdf..5654f3b0 100644
--- a/lib/PublicInbox/IO.pm
+++ b/lib/PublicInbox/IO.pm
@@ -15,10 +15,8 @@ use Errno qw(EINTR EAGAIN);
 
 sub waitcb { # awaitpid callback
 	my ($pid, $errref, $cb, @args) = @_;
-	$errref //= \my $workaround_await_pids_clobbered;
-	$$errref = $?; # sets .cerr for _close
+	$$errref = $? if $errref; # sets .cerr for _close
 	$cb->($pid, @args) if $cb; # may clobber $?
-	$? = $$errref;
 }
 
 sub attach_pid {
@@ -52,7 +50,7 @@ sub close {
 	} else { # wait synchronously
 		my $w = awaitpid($reap->[1]);
 	}
-	$? ? '' : $ret; # use $?, AWAIT_PIDS may be cleared on ->Reset (FIXME?)
+	$? ? '' : $ret;
 }
 
 sub DESTROY {