Some updates

[YOzaz]

Hi, few updates here:

• Correct action to hook into
• Missing username and password fields
• Missing anchor (fragment) fields
• Query string may be empty

[particthistle]

Having just looked at PR #3, @YOzaz suggestions also value add to the code up more.

Looking at #3 and then #5, on line 15, the $code variable in the function is not used, so this could also be removed in your PR @YOzaz, or @llonchj can you advise if it's actually necessary?