public String getConfigPath() {
        return configPath;
    }
Returns the config path to be used to load a .ini file for configuration if a configuration is
not specified via the {@link #getConfig() config} attribute.
<p/>
This value is {@code null} by default, but it will be automatically set to the value of the
'{@code configPath}' {@code init-param} if it exists in the {@code FilterConfig} provided by the servlet
container at startup.

@return the config path to be used to load a .ini file for configuration if a configuration is
not specified via the {@link #getConfig() config} attribute.
web/src/main/java/org/apache/shiro/web/servlet/IniShiroFilter.java