Bug#848346: libnet-ssleay-perl: certificate verify fails

[Aldus]

Package: libnet-ssleay-perl
Version: 1.78-1+b1
Severity: important

Dear Maintainer,

libnet-ssleay-perl was broken by the upgrade from 1.78-1 to 1.78-1+b1.

In order to check for unread mail on remote servers (googlemail and
others), I use a script including the following lines:

  my $socket = IO::Socket::SSL->new(
    PeerAddr => 'imap.googlemail.com',
    PeerPort => 993
   )
   or die "socket(): $@";

This worked until yesterday. After upgrading libnet-ssleay-perl to
1.78-1+b1, the script returns the error message:

  socket(): SSL connect attempt failed error:1416F086:SSL
  routines:tls_process_server_certificate:certificate verify failed at
  ./gmail.pl line 13 [the line quoted above]

To make the script work again, I downgraded libnet-ssleay-perl to 1.78-1, 
but I hope the bug to be fixed soon.

Regards, Aldus 

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: i386 (i686)

Kernel: Linux 4.8.0-2-686-pae (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libnet-ssleay-perl depends on:
ii  libc6                       2.24-8
ii  libssl1.1                   1.1.0c-2
ii  perl                        5.24.1~rc4-1
ii  perl-base [perlapi-5.24.1]  5.24.1~rc4-1

libnet-ssleay-perl recommends no packages.

Versions of packages libnet-ssleay-perl suggests:
ii  libperl5.24 [libmime-base64-perl]  5.24.1~rc4-1

-- no debconf information