Bumb BLCR
ntp: security update, and use libcrypto

http://support.ntp.org/bin/view/Main/SecurityNotice#Recent_Vulnerabilities

The package would no longer build without libcrypto,
and it wouldn't find it without pkgconfig.
I checked that Debian and Arch do use openssl as a dependency,
so it's probably not so bad a thing to have.

CC maintainer @edolstra.

(cherry picked from commit 0fbc5ddadb47c704ce4e41792ce4d61d8ee1c9af)
ntp: Don't depend on openssl, don't install docs

(cherry picked from commit 782440310d69d239cc5480f97abf6a3a56a2840c)
Fix ntpd

Since the 4.2.8 upgrade, ntpd is broken on NixOS:

  Dec 28 19:06:54 hagbard ntpd[27723]: giving up resolving host 1.nixos.pool.ntp.org: Servname not supported for ai_socktype (-8)

This appears to be because DNS resolution doesn't work in chroots
anymore (due to /etc being missing). So disable chroots for now. It's
probably better to use systemd's containment facilities anyway.

(cherry picked from commit ea9d391bb5b1f8eb26e6fc0410de353a82e4220a)
libpng: security update (no CVE yet)

http://www.securitytracker.com/id/1031444
(cherry picked from commit 5d903d850a8aca3e1825a00fd06c2e5c9d1d60f2)
Adding scantailor.
gummiboot-builder.py: run nix with no build-users-group

During install, the bootloader script gets run inside a chroot after the
/etc/group bind-mount is unmounted. Since we're not doing any building,
this should be safe, but really nix should just not care if the group
does not exist when no build is needed.

Fixes #5494

(cherry picked from commit 9245516b46a64316f1d7b0622ff12519a0316044)
Signed-off-by: Domen Kožar <domen@dev.si>
Add rubyLibs.newrelic_plugin

(cherry picked from commit a1e094426338b393450b38dffeda74da92ba0f4f)
Add rubyLibs.rabbitmq_manager

(cherry picked from commit 487325a68c510749deb8866687deb8d894b4ae60)
Add rubyLibs.redis

(cherry picked from commit 3cf067708712a130995a8f59926f18fbd8bd6357)