docs/BINDINGS: fix outdated links

* luacurl page is now not accessible, fix it with wayback machine page
* Scheme one seems not providing https now, change it back to http one

Closes #7301

docs/BINDINGS.md

@@ -59,7 +59,7 @@ Go: [go-curl](https://github.com/andelf/go-curl) by ShuYu Wang
 
 [Lisp](https://common-lisp.net/project/cl-curl/) Written by Liam Healy
 
-Lua: [luacurl](http://luacurl.luaforge.net/) by Alexander Marinov, [Lua-cURL](https://github.com/Lua-cURL) by Jürgen Hötzel
+Lua: [luacurl](https://web.archive.org/web/20201205052437/http://luacurl.luaforge.net/) by Alexander Marinov, [Lua-cURL](https://github.com/Lua-cURL) by Jürgen Hötzel
 
 [Mono](https://forge.novell.com/modules/xfmod/project/?libcurl-mono) Written by Jeffrey Phillips
 
@@ -100,7 +100,7 @@ Ruby: [curb](https://github.com/taf2/curb) written by Ross Bamford
 
 [Rust](https://github.com/carllerche/curl-rust) curl-rust - by Carl Lerche
 
-[Scheme](https://www.metapaper.net/lisovsky/web/curl/) Bigloo binding by Kirill Lisovsky
+[Scheme](http://www.metapaper.net/lisovsky/web/curl/) Bigloo binding by Kirill Lisovsky
 
 [Scilab](https://help.scilab.org/docs/current/fr_FR/getURL.html) binding by Sylvestre Ledru