Fixing issues with unwanted querystring parameters.

Because the request url was being appended as ?/$1 any nested
named parameters would be added as additional GET params.  This is
yet another case where named parameters are fail.  Modify the built-in
htaccess rules to not use a GET parameter at all, and just read
from REQUEST_URI.

Fixes #2678

app/webroot/.htaccess

@@ -2,5 +2,5 @@
     RewriteEngine On
     RewriteCond %{REQUEST_FILENAME} !-d
     RewriteCond %{REQUEST_FILENAME} !-f
-    RewriteRule ^(.*)$ index.php?/$1 [QSA,L]
+    RewriteRule ^(.*)$ index.php [QSA,L]
 </IfModule>

lib/Cake/Console/Templates/skel/webroot/.htaccess

@@ -2,5 +2,5 @@
     RewriteEngine On
     RewriteCond %{REQUEST_FILENAME} !-d
     RewriteCond %{REQUEST_FILENAME} !-f
-    RewriteRule ^(.*)$ index.php?/$1 [QSA,L]
+    RewriteRule ^(.*)$ index.php [QSA,L]
 </IfModule>