don't try to use mod_rewrite when it isn't enabled

having a broken web/card/caldav is much better as having no ownCloud at all :)

.htaccess

@@ -5,6 +5,8 @@ php_value post_max_size 512M
 php_value memory_limit 512M
 SetEnv htaccessWorking true
 </IfModule>
+<IfModule mod_rewrite.c>
 RewriteEngine on
 RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]
+</IfModule>
 Options -Indexes

lib/setup.php

@@ -275,7 +275,7 @@ class OC_Setup {
 		$content.= "php_value post_max_size 512M\n";
 		$content.= "SetEnv htaccessWorking true\n";
 		$content.= "</IfModule>\n";
-		$content.= "<IfModule !mod_php5.c>\n";
+		$content.= "<IfModule mod_rewrite.c>";
 		$content.= "RewriteEngine on\n";
 		$content.= "RewriteRule .* - [env=HTTP_AUTHORIZATION:%{HTTP:Authorization},last]\n";
 		$content.= "</IfModule>\n";