am 20856f71: am c9f7890a: Revise some javadocs for NFC; add package description

Merge commit '20856f71d971a85a25307941055fb9543adcdc68'

* commit '20856f71d971a85a25307941055fb9543adcdc68':
  Revise some javadocs for NFC; add package description
tree: 60e01d1b54244b5da6a07286d5794b6fb7346442
  1. cmds/
  2. include/
  3. libs/
  4. opengl/
  5. services/
  6. vpn/
  7. MODULE_LICENSE_APACHE2
  8. NOTICE