### Queue Manager Connection Authentication using a htpasswd file

This pluggable authentication mode is to allow developers using the mq-container developer image to define users and their credentials into a .htpasswd file.  This is in addition to the existing methods of MQ Connection Authentication (`CONNAUTH`) using Operating System or LDAP users.

**Please note:**
1. This new feature is enabled only when environment variable `--env MQ_CONNAUTH_USE_HTP=true` is set while creating a container.
2. When enabled, the `AuthType` value of the ConnectionAuthentication (`CONNAUTH`) is ignored and htpasswd mode is used. However, the MQ authority records created using (`SETMQAUT` or `AUTHREC`) will be in effect while using the htpasswd mode.
3. Channel Authentication records (`CHLAUTH`) will be in effect while using the htpasswd mode.
4. Passwords should be encrypted using bcrypt (golang.org/x/crypto/bcrypt).
5. This is developer only feature and not recommended for use in Production.

### Preparing htpasswd file

 1. A default `mq.htpasswd` file is provided and placed under /etc/mqm/ directory inside the container.
 2. You can set the password for user `admin` by setting the environment variable `MQ_ADMIN_PASSWORD`.
 3. You can add user `app` into mq.htpasswd file by setting the environment variable `MQ_APP_PASSWORD`. This user `app` can be used to access `DEV.*` objects of the queue manager.

#### Next Steps:

Use an administrative tool or your application to connect to queue manager using the credentials defined in the mq.htpasswd file.  

**Please note**: When an authentication request is made with a userid that is not defined in the `mq.htpasswd` file, then the authentication process is delegated to queue manager to handle. This will then use `IDPWOS` or `LDAP` modes for further processing.

#### Troubleshooting

A log file named `mqhtpass.log` is generated under `/var/mqm/errors` directory path of the container.  This file will contain all the failed connection authentication requests.  Additional information is logged to this file if the environment variable `DEBUG` is set to `true`.

**Please note**: This log file will be wiped when the queue manager is next started.