Canonical url check

[webysther]

Allow canonical check on server-side.

I already fixed on client-side on the extension:

• Fix final slash on url linkding-extension#98
• Fix slash and params sort linkding-extension#99

Final slash on the url

https://example.com/ == https://example.com

Parameter order in the url

https://example.com/path?b=2&a=1 == https://example.com/path?a=1&b=2

Related to: #958

[gingerbeardman]

Whilst you're in there, any chance of an update on #206 ?

[webysther]

Whilst you're in there, any chance of an update on #206 ?

Yeap, how do u fixed, keeping the validation disabled?

[gingerbeardman]

I prefer not to disable validation, so for any problematic links I add a wayback machine version of the link. They pass the validation even though they contain the same URL. Only a handful of ~4000 links need this treatment