它重定向额外的变量在产品列表页面，如/ 11类名？排序依据=名称及orderway = ASC（只有搜索引擎）
Default language redirect (only available in PS 1.2).
Index.php and index.html redirect.
Fixes minor issues with redirect and extra variables.
(I.E Term and conditions from the checkout process was not opening up in a thickbox properly).
Fixes a bug with “Send to friend” which was not opening up properly.
Removes id_lang, isolang, and other redirect improvements.
Major new feature to redirect Product Listing URLs with extra variables (only for Search Engines).
It should be used together with the modification in http://www.prestashop.com/forums/viewthread/74380/
Extra variables redirection on manufacturer and supplier pages.
Redirection fix for Location Detection 1.5 (?redirected).
Fix for bad URLs caused by the Canonical URL module (IE http://www.yoursite.com/www.yoursite.com/1-products.html).
Bug fix for URLs with spaces in variables (IE yoursite.com/1-product.html?variable=with space ).
New condition to redirect by page name rather than id variable (for product, category, supplier, manufacturer and cms).
Support for PS 1.4
Redirect pre-PS1.4 language URLs (IE /lang-en/2-music-ipods to /en/2-music-ipods).
Redirect old CMS pages (IE /content/4-about-us to /en/content/4-about-us).
Redirect the default language homepage URL from /en/ to / (only when Canonical redirect is disabled).
Redirect all HTTPS pages to HTTP for search engines.
Bug fix from last version on PS1.3 for search engine redirect of new products, best seller and special pages.
Bug fix for CMS redirect on PS1.4 when only 1 language is active.
New override code for PS1.4. (fixes search engine redirect for send to a friend pages) .
Improved override code for PS1.4
Redirect search engines from Cart + Checkout pages (Prevent them from creating ghost carts).
Added installation Self Checker (PS 1.4+)
Optimized override code.
Added upgrade notification.
Added redirect to homepage for all deleted or invalid product, category, CMS, supplier and manufacturer (to avoid 404 errors and duplicate content).
Added a temporary 302 redirect to homepage for all disabled product, category, CMS, supplier and manufacturer (to avoid 404 errors and duplicate content).
Added redirect from / to /xx/ when adding a second language to PS.
Incorrent FrontController.php was included.
Fix for a language redirect (from V1.3.2)
Added debug capability (in redirect() function)
Support for PS 1.5
Improved override file copy check.
Added support for Schemas of URLs (PS 1.5)
Redirecting disabled products and categories to parent category.
If more than 1 language was enabled, and then disabled, URLs will be redirected (from /en/... to /)
Automatically disabled Canonical URLs (which is replaced by the module)
Fixed a bug with different languages in multistore.
Fixed a bug with redirect of unfriendly URLs (PS 1.5)
Fixed a bug with currency change.
Updated FrontController for PS 1.5
Fix for pagination.
Added redirect for renamed / moved products using Schemas of URLs (Prestashop was returning 404).
Added redirect to the default language for URLs of a deleted / disabled language.
Fixed CMS redirect bug for additional languages in PS 1.4 and lower.
IMPORTANT FIX affecting redirect of modules from V1.4.3
Added "Status" header, to avoid conflict with "Location" header in certain servers.
Updated header text for 302 redirect.
Added support for PrestaShop 1.6
Added redirect for old product and category pages which were identified by PS as "page not found"
Removed redirect from https to http for search engines
Fixed issue with disabled product preview from the backend