[PATCH 1/3] use v5.12 for various network client-side packages

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

None of these are affected by the Perl unicode_strings feature,
so they can `use v5.12' safely
---
 lib/PublicInbox/GitCredential.pm | 8 +++++---
 lib/PublicInbox/NetNNTPSocks.pm  | 5 ++---
 lib/PublicInbox/NetReader.pm     | 3 +--
 lib/PublicInbox/NetWriter.pm     | 5 ++---
 lib/PublicInbox/URIimap.pm       | 5 ++---
 lib/PublicInbox/URInntps.pm      | 4 ++--
 6 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/lib/PublicInbox/GitCredential.pm b/lib/PublicInbox/GitCredential.pm
index b18bba1e..10114a10 100644
--- a/lib/PublicInbox/GitCredential.pm
+++ b/lib/PublicInbox/GitCredential.pm
@@ -1,7 +1,9 @@
-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+
+# git-credential wrapper with built-in .netrc fallback
 package PublicInbox::GitCredential;
-use strict;
+use v5.12;
 use PublicInbox::Spawn qw(popen_rd);
 
 sub run ($$;$) {
@@ -19,7 +21,7 @@ sub run ($$;$) {
 
 	my $out = '';
 	for my $k (qw(url protocol host username password)) {
-		defined(my $v = $self->{$k}) or next;
+		my $v = $self->{$k} // next;
 		die "`$k' contains `\\n' or `\\0'\n" if $v =~ /[\n\0]/;
 		$out .= "$k=$v\n";
 	}
diff --git a/lib/PublicInbox/NetNNTPSocks.pm b/lib/PublicInbox/NetNNTPSocks.pm
index 8495204a..fcd2e580 100644
--- a/lib/PublicInbox/NetNNTPSocks.pm
+++ b/lib/PublicInbox/NetNNTPSocks.pm
@@ -1,10 +1,9 @@
-# Copyright (C) 2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # wrap Net::NNTP client with SOCKS support
 package PublicInbox::NetNNTPSocks;
-use strict;
-use v5.10.1;
+use v5.12;
 use Net::NNTP;
 our %OPT;
 our @ISA = qw(IO::Socket::Socks);
diff --git a/lib/PublicInbox/NetReader.pm b/lib/PublicInbox/NetReader.pm
index 4de2583e..6802fa72 100644
--- a/lib/PublicInbox/NetReader.pm
+++ b/lib/PublicInbox/NetReader.pm
@@ -3,8 +3,7 @@
 
 # common reader code for IMAP and NNTP (and maybe JMAP)
 package PublicInbox::NetReader;
-use strict;
-use v5.10.1;
+use v5.12;
 use parent qw(Exporter PublicInbox::IPC);
 use PublicInbox::Eml;
 use PublicInbox::Config;
diff --git a/lib/PublicInbox/NetWriter.pm b/lib/PublicInbox/NetWriter.pm
index 4a1f34f6..7917ef89 100644
--- a/lib/PublicInbox/NetWriter.pm
+++ b/lib/PublicInbox/NetWriter.pm
@@ -1,10 +1,9 @@
-# Copyright (C) 2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # common writer code for IMAP (and later, JMAP)
 package PublicInbox::NetWriter;
-use strict;
-use v5.10.1;
+use v5.12;
 use parent qw(PublicInbox::NetReader);
 use PublicInbox::Smsg;
 use PublicInbox::MsgTime qw(msg_timestamp);
diff --git a/lib/PublicInbox/URIimap.pm b/lib/PublicInbox/URIimap.pm
index 81644914..41c2842a 100644
--- a/lib/PublicInbox/URIimap.pm
+++ b/lib/PublicInbox/URIimap.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2020-2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 # cf. RFC 5092, which the `URI' package doesn't support
 #
@@ -11,8 +11,7 @@
 #
 # RFC 2192 also describes ";TYPE=<list_type>"
 package PublicInbox::URIimap;
-use strict;
-use v5.10.1;
+use v5.12;
 use URI::Split qw(uri_split uri_join); # part of URI
 use URI::Escape qw(uri_unescape uri_escape);
 use overload '""' => \&as_string;
diff --git a/lib/PublicInbox/URInntps.pm b/lib/PublicInbox/URInntps.pm
index 231b247b..88c8d641 100644
--- a/lib/PublicInbox/URInntps.pm
+++ b/lib/PublicInbox/URInntps.pm
@@ -1,4 +1,4 @@
-# Copyright (C) 2021 all contributors <meta@public-inbox.org>
+# Copyright (C) all contributors <meta@public-inbox.org>
 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
 
 # deal with the lack of URI::nntps in upstream URI.
@@ -6,7 +6,7 @@
 # cf. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=983419
 # Fixed in URI 5.08, we can drop this by 2035 when LTS distros all have it
 package PublicInbox::URInntps;
-use strict;
+use v5.12;
 use parent qw(URI::snews);
 use URI;