Log Message:
Updated tigervnc to 1.7.0.

Still using xorg-server-1.17.2 for now.

The proper release of TigerVNC 1.7.0 is now available. Lots of
changes have been made since the last release, but the highlights
are:

    Multi-threaded decoder in the FLTK viewer
    Windows Vista/2008 is now the minimum requirement
    Improved SSH integration in the Java viewer
    Fine grained lock down of Xvnc parameters
    Compatibility with Xorg 1.18
    Lots of packaging fixes
    Better compatibility with Vino, both in the FLTK and Java viewer