Support Ubuntu 19.10 (#1630)

Add Travis tests

.travis.yml

@@ -112,12 +112,18 @@ matrix:
     - <<: *deploy-local
       name: 'Ubuntu 19.04: local deployment from docker'
       env: DEPLOY=docker UBUNTU_VERSION=19.04
+    - <<: *deploy-local
+      name: 'Ubuntu 19.10: local deployment from docker'
+      env: DEPLOY=docker UBUNTU_VERSION=19.10
     - <<: *deploy-cloudinit
       name: 'Ubuntu 18.04: cloud-init deployment'
       env: DEPLOY=cloud-init UBUNTU_VERSION=18.04
     - <<: *deploy-cloudinit
       name: 'Ubuntu 19.04: cloud-init deployment'
       env: DEPLOY=cloud-init UBUNTU_VERSION=19.04
+    - <<: *deploy-cloudinit
+      name: 'Ubuntu 19.10: cloud-init deployment'
+      env: DEPLOY=cloud-init UBUNTU_VERSION=19.10
 
 notifications:
   email: false

docs/deploy-to-ubuntu.md

@@ -4,7 +4,7 @@ You can use Algo to configure a pre-existing server as an AlgoVPN rather than us
 
 Install the Algo scripts following the normal installation instructions, then choose:
 ```
-Install to existing Ubuntu 18.04 or 19.04 server (Advanced)
+Install to existing Ubuntu 18.04, 19.04, or 19.10 server (Advanced)
 ```
 Make sure your target server is running an unmodified copy of the operating system version specified. The target can be the same system where you've installed the Algo scripts, or a remote system that you are able to access as root via SSH without needing to enter the SSH key passphrase (such as when using `ssh-agent`).
 

docs/deploy-to-unsupported-cloud.md

@@ -2,7 +2,7 @@
 
 Algo officially supports the [cloud providers listed here](https://github.com/trailofbits/algo/blob/master/README.md#deploy-the-algo-server). If you want to deploy Algo on another virtual hosting provider, that provider must support:
 
-1. the base operating system image that Algo uses (Ubuntu 18.04, 19.04), and
+1. the base operating system image that Algo uses (Ubuntu 18.04, 19.04, or 19.10), and
 2. a minimum of certain kernel modules required for the strongSwan IPsec server.
 
 Please see the [Required Kernel Modules](https://wiki.strongswan.org/projects/strongswan/wiki/KernelModules) documentation from strongSwan for a list of the specific required modules and a script to check for them. As a first step, we recommend running their shell script to determine initial compatibility with your new hosting provider.

input.yml

@@ -21,7 +21,7 @@
       - { name: Scaleway, alias: scaleway}
       - { name: OpenStack (DreamCompute optimised), alias: openstack }
       - { name: CloudStack (Exoscale optimised), alias: cloudstack }
-      - { name: Install to existing Ubuntu 18.04 or 19.04 server (Advanced), alias: local }
+      - { name: Install to existing Ubuntu 18.04, 19.04, or 19.10 server (Advanced), alias: local }
   vars_files:
     - config.cfg