Reorganized source tree. Moved client.cpp into cmd/synergy as

synergy.cpp and server.cpp into cmd/synergyd as synergyd.cpp.
Moved and renamed related files.  Moved remaining source files
into lib/....  Modified and added makefiles as appropriate.
Result is that library files are under lib with each library
in its own directory and program files are under cmd with each
command in its own directory.

lib/net/XSocket.cpp

@@ -0,0 +1,102 @@
+#include "XSocket.h"
+
+//
+// XSocketAddress
+//
+
+XSocketAddress::XSocketAddress(EError error,
+				const CString& hostname, UInt16 port) throw() :
+	m_error(error),
+	m_hostname(hostname),
+	m_port(port)
+{
+	// do nothing
+}
+
+XSocketAddress::EError
+XSocketAddress::getError() const throw()
+{
+	return m_error;
+}
+
+CString
+XSocketAddress::getHostname() const throw()
+{
+	return m_hostname;
+}
+
+UInt16
+XSocketAddress::getPort() const throw()
+{
+	return m_port;
+}
+
+CString
+XSocketAddress::getWhat() const throw()
+{
+	static const char* s_errorID[] = {
+		"XSocketAddressUnknown",
+		"XSocketAddressNotFound",
+		"XSocketAddressNoAddress",
+		"XSocketAddressBadPort"
+	};
+	static const char* s_errorMsg[] = {
+		"unknown error for: %{1}:%{2}",
+		"address not found for: %{1}",
+		"no address for: %{1}",
+		"invalid port"				// m_port may not be set to the bad port
+	};
+	return format(s_errorID[m_error], s_errorMsg[m_error],
+								m_hostname.c_str(), 
+								CStringUtil::print("%d", m_port).c_str());
+}
+
+
+//
+// XSocketErrno
+//
+
+XSocketErrno::XSocketErrno() :
+	MXErrno()
+{
+	// do nothing
+}
+
+XSocketErrno::XSocketErrno(int err) :
+	MXErrno(err)
+{
+	// do nothing
+}
+
+
+//
+// XSocketBind
+//
+
+CString
+XSocketBind::getWhat() const throw()
+{
+	return format("XSocketBind", "cannot bind address");
+}
+
+
+//
+// XSocketConnect
+//
+
+CString
+XSocketConnect::getWhat() const throw()
+{
+	return format("XSocketConnect", "cannot connect socket");
+}
+
+
+//
+// XSocketCreate
+//
+
+CString
+XSocketCreate::getWhat() const throw()
+{
+	return format("XSocketCreate", "cannot create socket");
+}