xF2 Add-on [xenMade.com] 404 Enhancement (ST404) 1.5.0

[add] Improved URL recognition
[add] Redirect for Merge Threads - to the merged thread
[add] Delete XF-Redirect Thread u can insert Redirect URL
[add] Options: Errors per Page
[add] Mass Delete
[fixed] "Page" is no longer considered in the URL
[fixed] "404 Redirects List" Order dont work
[fixed] Missing Phrase
[fixed] Many optimizations and bugfixes