https://github.com/jedisct1/dnscrypt-proxy/blob/master/ChangeLog

Now all invocations have following order of arguments (if present):

    addgroup -S -g ... GROUP
    adduser -S -u ... -D -H -h ... -s ... -G ... -g ... USER

Following rules have been applied:
- script starts with shebang !#/bin/sh followed by blank line,
- script ends with exit 0 prepended by blank line,
- only stderr of adduser, addgroup or passwd is redirected to /dev/null,
- getent passwd/group instances has been removed,
- manual checking of file and group existence has been removed,
- `|| true` instances has been removed.

Comments and line wrapping have been preserved.

This way we can avoid ugly default:

    Linux user,,,

Malformed packets could cause the OpenDNS deviceid, OpenDNS set-client-ip, blocking and
AAAA blocking plugins to use uninitialized pointers, leading to a denial of service or
possibly code execution.

The vulnerable code is present since dnscrypt-proxy 1.1.0.

OpenDNS users and people using dnscrypt-proxy in order to block domain names and
IP addresses should upgrade as soon as possible.

small fix for tail in coreutils + clean some whitespace.