NSS SSL Only Works In Debug Mode

This bug still exists on my Ubuntu 16.04 system.
Please see https://github.com/networkupstools/nut/issues/190 for more information. I have included the text description from there below. Looks like the issue was fixed back in April of 2015 in 2.7.3.
16.04 packages nu version:
ii nut-server 2.7.2-4ubuntu1 amd64 network UPS tools - core system

From the github page:
Client SSL connections do not complete when connecting to upsd running as a daemon when linked to NSS. Running upsd in the foreground (upsd -D) works fine.

Originally identified on Ubuntu 14.04, which compiles NUT 2.7.1 against NSS (libnss3):

$ dpkg-query -W nut-server libnss3 libnspr4
libnspr4:i386 2:4.10.7-0ubuntu0.14.04.1
libnss3:i386 2:3.17.4-0ubuntu0.14.04.1
nut-server 2.7.1-1ubuntu1
Verified with NUT 2.7.2.6+ (git master @ 197eafa) on Linux Mint (also based on Ubuntu 14.04).

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: nut 2.7.2-4ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Fri Apr 29 01:36:38 2016
JournalErrors:
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] failed with exit code 1: Hint: You are currently not seeing messages from other users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
KernelVersion: Linux rex 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
PackageArchitecture: all
SourcePackage: nut
UpgradeStatus: Upgraded to xenial on 2016-04-21 (7 days ago)