Use stronger language and link to faq, fixes #5382, closes #5383

src/Composer/Console/Application.php

@@ -182,7 +182,7 @@ class Application extends BaseApplication
             if (!Platform::isWindows() && function_exists('exec') && !getenv('COMPOSER_ALLOW_SUPERUSER')) {
                 if (function_exists('posix_getuid') && posix_getuid() === 0) {
                     if ($commandName !== 'self-update' && $commandName !== 'selfupdate') {
-                        $io->writeError('<warning>Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted</warning>');
+                        $io->writeError('<warning>Do not run Composer as root/super user! See https://getcomposer.org/root for details</warning>');
                     }
                     if ($uid = (int) getenv('SUDO_UID')) {
                         // Silently clobber any sudo credentials on the invoking user to avoid privilege escalations later on