public void setFailureKeyAttribute(String failureKeyAttribute) {
        this.failureKeyAttribute = failureKeyAttribute;
    }
Sets the request parameter name to look for when acquiring the rememberMe boolean value.  Unless overridden
by calling this method, the default is <code>rememberMe</code>.
<p/>
RememberMe will be <code>true</code> if the parameter value equals any of those supported by
{@link WebUtils#isTrue(ServletRequest, String) WebUtils.isTrue(request,value)}, <code>false</code>
otherwise.

@param rememberMeParam the name of the request param to check for acquiring the rememberMe boolean value.
web/src/main/java/org/apache/shiro/web/filter/authc/FormAuthenticationFilter.java