Replace folded-in version of ruby acme-client with ~3 year old version

Closes #199

See merge request sympl.host/sympl!14

Update control Added ruby-json-jwt and gcc requirements for symbiosis-ssl

Closes #198

See merge request sympl.host/sympl!13

Virtualbox is more representative of an actual running machine than Docker is, so this swaps to running the install on a standard netboot Debian 9 image with SSH, gitlab-runner, and minimal changes.

Closes #19

See merge request sympl.host/sympl!12

Many fixes

Allows packages to automatically build and install (inside a docker container).

Fixes #18

See merge request sympl.host/sympl!11

Many changes, but we now use `debconf-set-selections` to choose relevant defaults, and use sane options.

Note while this will install inside a docker container, services may be a bit odd as there's no real init in the container.

This also includes a pre-build docker container (in the GitLab docker registry) which is used for the initial packaging stage, and saves a load of time installing a load of dependencies each time it starts.

Folded in ruby-acme-client from https://github.com/BytemarkHosting/acme-client

Closes #6

See merge request sympl.host/sympl!10

Folded in ruby-netlink libraries from https://github.com/BytemarkHosting/netlinkrb

See merge request sympl.host/sympl!9

removes cracklib requirement but raises issues

See merge request sympl.host/sympl!8

replaced ruby-cracklib with ruby-password
removed dependency for cracklib-runtime
* defanged symbiosis-encrypt-password (raises #16)
* effectively negates symbiosis-password-test functionality (raises #17)

Folded in ruby-dbus-systemd libs from https://github.com/nathwill/ruby-dbus-systemd

Closes #10

See merge request sympl.host/sympl!7

Updated to backports prosody-modules package.

Closes #11

See merge request sympl.host/sympl!6

Fixes for install task

Closes #9, #8, and #7

See merge request sympl.host/sympl!5

Removed references to Bytemark keys, added debian backports for missing dependencies

Continue de-Bytemarking .gitlab-ci.yaml

Closes #3

See merge request sympl.host/sympl!4

Currently has a number of dependencies missing however, the 'internal' tests are broken, and there are no 'external' tests at present.

Import gitlab-ci fix

See merge request sympl.host/sympl!3

Import gitlab-ci fix from https://gitlab.com/lupine/symbiosis/commit/ab442a878133793037bcd6a6d1519c9c98d72e4a

Re branding

See merge request open-source/symbiosis!107

Add new file

See merge request open-source/symbiosis!108