Xpra

* fix invalid X11 atom
* fix unhandled failure code from libav
* fix default socket permissions when config file is missing
* fix error handling for missing cuda kernels
* fix OpenGL paint early errors
* fix "print" control command with multiple clients
* skip sending invalid packet to client for the "name" control command
* more helpful dpi warning
* support connecting to named unix domain sockets
* OpenGL option can force enable despite platform checks
* replace unsafe deprecated API call in HTML5 client
* more reliable and clean shutdown of connections and threads
* log internal system failures as errors

* fix rgb encodings can use speed setting
* fix propagation of dynamic attributes for OR windows
* fix invalid warnings in parsing client connection options
* fix handling of the window decorations flag
* fix missing lock around Python logger callback
* fix size-hints with shadow servers
* fix max-size switch
* fix sound process communication errors during failures
* fix invalid options shown in default config file
* add missing file to clean list
* skip unnecessary workarounds with GTK3 client
* cleaner thread cleanup on server exit
* use the safer and slower code with non-OpenGL clients

* fix window transparency
* fix displayfd Xorg version check: require version 1.13
* fix GUI debug script on OSX
* fix typo in list of supported X11 atoms
* fix exit-with-children: support sharing mode
* fix html option for client only builds
* fix pulseaudio not killed on exit on Ubuntu
* fix signal leak when client disconnects
* include shared mime info file mapping
* blacklist Ubuntu Vivid, which broke Xdummy, again
* don't reject clients providing a password when none is expected
* raise maximum clipboard requests per second to 20
* remove old VP9 performance warnings

* printer forwarding
* functional HTML5 client
* add session idle timeout switch
* add html command line switch for easily setting up an HTML5 xpra server
* dropped support for Python 2.5 and older, allowing many code cleanups and improvements
* include manual in html format with MS Windows and OSX builds
* add option to control socket permissions (easier setup of containers)
* client log output forwarding to the server
* fixed workarea coordinates detection for MS Windows clients
* improved video region detection and handling
* more complete support for window states (keep above, below, sticky, etc..) and general window manager responsibilities
* allow environment variables passed to children to be specified in the config files
* faster reformatting of window pixels before compression stage
* support multiple delta regions and expire them (better compression)
* allow new child commands to be started on the fly, also from the client's system tray (disabled by default)
* detect mismatch between some codecs and their shared library dependencies
* NVENC SDK support for versions 4 and 5, YUV444 and lossless mode
* libvpx support for vp9 lossless mode, much improved performance tuning
* add support for child commands that do not interfere with "exit-with-children"
* add scaling command line and config file switch for controlling automatic scaling aggressiveness
* sound processing is now done in a separate process (lower latency, and more reliable)
* add more control over sound command line options, so sound can start disabled and still be turned on manually later
* add command line option for selecting the sound source (pulseaudio, alsa, etc)
* show sound bandwidth usage
* better window icon forwarding, especially for non X11 clients
* optimized OpenGL rendering for X11 clients
* handle screen update storms better
* window group-leader support on MS Windows (correct window grouping in the task bar)
* GTK3 port improvements (still work in progress)
* added unit tests which are run automatically during packaging
* more detailed information in xpra info (cursor, CPU, connection, etc)
* more detailed bug report information
* more minimal MS Windows and OSX builds

* support for lzo compression
* support for choosing the compressors enabled (lz4, lzo, zlib)
* support for choosing the packet encoders enabled (bencode, rencode, yaml)
* support for choosing the video decoders enabled
* built in bug report tool, capable of collecting debug information
* automatic display selection using Xorg "-displayfd"
* better video region support, increased quality for non-video regions
* more reliable exit and cleanup code, hooks and notifications
* prevent SSH timeouts on login password or passphrase input
* automatic launch the correct tool on MS Windows
* OSX: may use the Application Services folder for a global configuration
* removed python-webm, we now use the native cython codec only
* OpenCL: warn when AMD icd is present (causes problems with signals)
* better avahi mDNS error reporting
* better clipboard compression support
* better packet level network tuning
* support for input methods
* xpra info cleanups and improvements (show children, more versions, etc)
* integrated keyboard layout detection on *nix
* upgrade and shadow now ignore start child
* improved automatic encoding selection, also faster
* keyboard layout selection via system tray on *nix
* more Cython compile time optimizations
* some focus issues fixed

* re-fix opengl compatibility