* Improved pidfile handling code contributed by Jay Berkenbilt.
Changes 3.9.1:
* Fix assertion failure on 64-bit architectures using LZO 2.0+.
* Clean up harmless compiler warnings in ClientMultiplexer and
ServerMultiplexer.
Changes 3.9.0:
* Re-implemented EncodeBuffer/DecodeBuffer to use considerably less CPU and
very slightly improve compression.
* Builds with LZO 2.0 release.
* Compiles under the Mingw environment to create native Win32 binaries.
* Added dxpcssh sample script courtesy of Wicher Minnaard.
* Added dxpc.spec file contributed by Daniel Mealha Cabrita.
* Fixed some small memory leaks and potential buffer overruns.
* Indented all sources.
Minor maintainance release. Interesting changes include
Added -b option to force backing store
Changed license to BSD license.
Performance optimizations
Updated usage command, which was sorely out of date.
Added -D option to specify display on server side
Added proxy port to lock file name, making it possible to run multiple
processes on the same unit on different proxy ports.
Support for LZO bitmap image compression
dxpc now accepts the new option -i[n] for image compression.
