Implements support in both client and server for the extended
clipboard format first seen in UltraVNC. Currently only implements
text handling, but that is still an improvement as it extends the
clipboard from ISO 8859-1 to full Unicode.

We now filter incoming data, which means we can start assuming the
clipboard data is always null terminated. This allows us to clean
up a lot of the internal handling.

This is required by the protocol so we should make sure it is
enforced. We are tolerant of clients that violate this though and
convert incoming clipboard data.

This is a lot safer and cleaner. The old code had a fixed size that
we didn't properly keep track of.

Make sure all methods only write what is given as arguments, and
avoid side effects by getting data from parameter objects. This keeps
things readable in the calling code.

We need to track different things in the server and client, so
separate things to two independent structures to keep things more
clear.

Avoid direct access to the screen dimensions and layout so that we
can make sure it stays sane. This also makes sure the layout is
properly updated when we only get the screen dimensions from the
server.

The handler is for incoming data and we should not be abusing that
class for the writer class. Do proper write prototypes for the
relevant functions.

As a result we weren't overloading properly.

This adds the basic infrastructure and handshake for the QEMU
Extended Key Events extension. No viewer or server makes use of
the extra functionality yet though.

Some servers respect the ordering of pseudo-encodings as well, so
make sure we list the best one first.

InputHandler declares the second parameter of clientCutText
as an int.

Fixes:

/home/shade/dev/tigervnc/common/rfb/CMsgWriter.h:60:18: error: 'rfb::CMsgWriter::clientCutText' hides overloaded virtual function [-Werror,-Woverloaded-virtual]
    virtual void clientCutText(const char* str, rdr::U32 len);
                 ^
/home/shade/dev/tigervnc/common/rfb/InputHandler.h:36:18: note: hidden overloaded virtual function 'rfb::InputHandler::clientCutText' declared here: type mismatch at 2nd parameter ('int' vs 'rdr::U32' (aka 'unsigned int'))
    virtual void clientCutText(const char* str, int len) {}
                 ^

Avoids having to special case things. Keeps the code simpler.

We have no need for this abstraction so let's keep things simple.

Custom compression level and JPEG on/off are not inherent parts of
the protocol negotiation so they do not belong in ConnParams. Let the
UI frontend handle such things instead.

We have no use for it, so let's keep things simple.

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This avoids big buffer overflow when memcpy is called with "-1" argument.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3607 3789f03b-4d11-0410-bbf8-ca57d06f2519

updating the desktop name on the fly.

Tested in ThinLinc since 2008-01-07. 



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