[Rpm-maint] RPM 4.16.0 released!

[Panu Matilainen]

This turned out to be a much bigger release than anticipated with 
several groundbreaking new features, despite finally being back to 
annual cycle almost to date. After a whopping six month testing period, 
here goes!

Highlights include:
* Database backends:
   * NDB backend promoted to stable
   * New sqlite-based backend
   * New experimental read-only BDB backend
   * BDB database backend deprecated
* Powerful macro and %if expressions including ternary operator
   and native version comparison
* Optional MIME type based file classification
* Dependency generation by parametric macros
* A new version parsing and comparison API in C and Python
* Parallelise test-suite execution
* Clarify RPM license

Further details & download info at:

     https://rpm.org/wiki/Releases/4.16.0

On behalf of the rpm-team, with special thanks to Michael Schroeder for 
all the database and expression work!

     - Panu -