Bug 193875 we can not get an entir url by IHTMLActionHandler
we can not get an entir url by IHTMLActionHandler, so word emitter dose not write the right url. now hyperlink drill through in word emitter doesn't work.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
* Context parameter name that gives preview report max rows limited.
	 */
	public static final String INIT_PARAM_VIEWER_MAXROWS = "BIRT_VIEWER_MAX_ROWS"; 
	/**
	 * Context parameter name that if always overwrite generated document file.
	 */
	public static final String INIT_PARAM_OVERWRITE_DOCUMENT = "BIRT_OVERWRITE_DOCUMENT"; 
	/**
	 * Context parameter name that defines BIRT viewer configuration file.
	 */
	public static final String INIT_PARAM_CONFIG_FILE = "BIRT_VIEWER_CONFIG_FILE"; 
	/**
	 * Context parameter name that if support print on the server
	 */
	public static final String INIT_PARAM_PRINT_SERVERSIDE = "BIRT_VIEWER_PRINT_SERVERSIDE"; 
	/**
	 * Context parameter name that if force optimized HTML output.
	 */
	public static final String INIT_PARAM_AGENTSTYLE_ENGINE = "HTML_ENABLE_AGENTSTYLE_ENGINE"; 
	/**
	 * UTF-8 encode constants.
	 */
	public static final String UTF_8_ENCODE = "UTF-8"; 
	/**
	 * ISO-8859-1 encode constants.
	 */
	public static final String ISO_8859_1_ENCODE = "ISO-8859-1"; 
	/**
	 * Separator that connects the query parameter values.
	 */