Log Message:
x11vnc: update to 0.9.15

x11vnc 0.9.15 2018-02-04
  Misc. buffer overflow and memleak fixes.
  Support for OpenSSL 1.1.0.
  Fix for Debian bug #672435.

x11vnc 0.9.14 2015-11-14
  Added support for the X Composite Extension.
  Added XInput 2 multi-pointer support
  Separated x11vnc sources from LibVNCServer.
  The project is now hosted at GitHub.