Expand information in ECL Client Tools Command Line

Request to expand the documentation in the following areas:
Comments on connection security:

There are several ways to pass credentials.
• you can supply both username and password on command line (insecure)
• you can save credentials in ecl.ini (also insecure)
• You can save credentials as environment variables (also insecure)
• you can provide username using any of the above methods and be prompted for password (best practice)

You will be prompted for password when adding the username to the command line:
It prompts whenever you provide a -u (username)

You are prompted for the password before connecting.

The default connect timeout is 3000ms and default read timeout is 7200s.
See Common Options:
--wait-connect=<Ms> Timeout while connecting to server (in milliseconds)
--wait-read=<Secs> Timeout while reading from socket (in seconds)