Obsolete legacy format

This format is exactly what its name implies: it is obsolete and should not be used when writing new configurations. 

In essence, everything that needs to be written on a single line that starts with a dollar sign is legacy format. Users of this format are encouraged to migrate to the basic or advanced formats.

• Simple sending using rsyslog (Obsolete legacy format)
• Secure sending using rsyslog (Obsolete legacy format)
• Monitoring files using rsyslog (Obsolete legacy format)