We mostly use classical C strings, but the memory management around them
can get confusing and error prone. Let's use std::string for the cases
where we need to return a newly allocated string.

This makes memory management more clear and robust when using these
helper functions.

This is explicitly a byte sequence, so let's try to keep a consistent
typing.

Let's avoid making this too complex and force every user to know about
magical functions.

Allows the default value to be dynamically generated in a buffer that is
reused.

Provides safety against them accidentally becoming negative because
of bugs in the calculations.

Also does the same to CharArray and friends as they were strongly
connection to the stream objects.

Add a Configuration::removeParam to support such cases.

Fix the following warnings emitted by Clang:

/home/shade/dev/tigervnc/common/rfb/Configuration.h:164:18: note: hidden overloaded virtual function 'rfb::VoidParameter::setParam' declared here: different number of parameters (0 vs 1)
    virtual bool setParam();
                 ^
/home/shade/dev/tigervnc/common/rfb/Configuration.h:256:18: error: 'rfb::BinaryParameter::setParam' hides overloaded virtual function [-Werror,-Woverloaded-virtual]
    virtual void setParam(const void* v, int l);
                 ^
/home/shade/dev/tigervnc/common/rfb/Configuration.h:164:18: note: hidden overloaded virtual function 'rfb::VoidParameter::setParam' declared here: different number of parameters (0 vs 2)
    virtual bool setParam();

Use the platform independent primitives instead.

It doesn't really make sense anymore given that settings might come
from the GUI or configuration and not only the command line.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@5064 3789f03b-4d11-0410-bbf8-ca57d06f2519

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to const char*.


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Configuration class. Change needed viewer/server code appropriately.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4032 3789f03b-4d11-0410-bbf8-ca57d06f2519

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git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/branches/merge-with-vnc-4.1.1@522 3789f03b-4d11-0410-bbf8-ca57d06f2519

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CustomCompressLevel is default if CompressLevel is specified.

This gives backwards compatibility with the old vncviewer, but at the
same time making it possible to fully specify the internal state of
the viewer wrt AutoSelect, CustomCompressLevel and CompressLevel. For
example, it's now possible to start the client with CompressLevel=4
specified, but with CustomCompressLevel=0 (thus the option
grayed-out).


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@79 3789f03b-4d11-0410-bbf8-ca57d06f2519

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