Merge branch 'mariadb' into 'master'

Add new MariaDB image.

See merge request !238

content/anvil/connecting_to_mysql.md

@@ -8,7 +8,7 @@ This guide assumes you associated your SSH Key Pair with the instance
 when it was created, and that you are connected to the [Anvil VPN]({{< relref "connecting_to_the_anvil_vpn" >}}).
 {{% /notice %}}
 
-The MySQL image HCC provides is a CentOS 7 image with MySQL (MariaDB) installed
+The MySQL images HCC provides are CentOS 7 based with MySQL/MariaDB installed
 and configured to allow remote access for a MySQL user named `root`.
 Access to MySQL is provided via this `root` user and a random password. When
 the instance is created, the password is set randomly using your

static/markdown/anvil-images.md

@@ -26,4 +26,5 @@
 | Ubuntu Cloud 16.04 LTS   |  `ubuntu`             | `ssh -l ubuntu <ipaddress>`         | Ubuntu Cloud Image from the 16.04 Long Term Support release.|
 | Ubuntu Cloud 17.04 LTS   |  `ubuntu`             | `ssh -l ubuntu <ipaddress>`         | Ubuntu Cloud Image from the 17.04 Long Term Support release.|
 | Ubuntu Cloud 18.04 LTS   |  `ubuntu`             | `ssh -l ubuntu <ipaddress>`         | Ubuntu Cloud Image from the 18.04 Long Term Support release.|
-| MySQL Server 5.5         |  `centos`/`root`      | `ssh -l centos <ip address>`/[MySQL instructions](/anvil/connecting_to_mysql)        | CentOS 7 based image with a pre-configured MySQL (MariaDB) server. |
+| MySQL Server 5.5         |  `centos`/`root`      | `ssh -l centos <ip address>`/[MySQL instructions](/anvil/connecting_to_mysql)  | CentOS 7 based image with a pre-configured MySQL (MariaDB) server. |
+| MariaDB Server 10.5      |  `centos`/`root`      | `ssh -l centos <ip address>`/[MySQL instructions](/anvil/connecting_to_mysql)  | CentOS 7 based image with a pre-configured MariaDB server. |