[BUGFIX] FeLogin: FlexForm is misleading

The option showLogoutFormAfterLogin in the FeLogin FlexForm actually
disables all redirect configuration on login. This patch reflects
that behavior by adjusting its label to better describe what it actually does.

Since the redirect is turned off if showLogoutFormAfterLogin is set
the FrontendLoginController is also prevented from gathering redirect
URLs in the first place.

Change-Id: I0be9d166e67dd055d6057e841d9fd5509ed1e8a7
Resolves: #67115
Releases: master
Reviewed-on: http://review.typo3.org/39671
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>

typo3/sysext/felogin/Classes/Controller/FrontendLoginController.php

@@ -159,7 +159,7 @@ public function main($content, $conf) {
 		// Is user logged in?
 		$this->userIsLoggedIn = $this->frontendController->loginUser;
 		// Redirect
-		if ($this->conf['redirectMode'] && !$this->conf['redirectDisable'] && !$this->noRedirect) {
+		if ($this->conf['redirectMode'] && !$this->conf['redirectDisable'] && !$this->noRedirect && !$this->conf['showLogoutFormAfterLogin']) {
 			$redirectUrl = $this->processRedirect();
 			if (count($redirectUrl)) {
 				$this->redirectUrl = $this->conf['redirectFirstMethod'] ? array_shift($redirectUrl) : array_pop($redirectUrl);

typo3/sysext/felogin/locallang_db.xlf

@@ -76,7 +76,7 @@
 				<source>Display Remember Login Option</source>
 			</trans-unit>
 			<trans-unit id="tt_content.pi_flexform.show_logoutFormAfterLogin">
-				<source>Display Logout Form After Successful Login</source>
+				<source>Disable redirect after successful login, but display logout-form</source>
 			</trans-unit>
 			<trans-unit id="tt_content.pi_flexform.groupSelectmode">
 				<source>FE group select mode:</source>