Compiling haxelib server on Haxe 4

[tobil4sk]

Issue to keep track of things that are forcing us to continue building the haxelib server with Haxe 3:

• [x] record-macros - see: https://github.com/HaxeFoundation/record-macros/pull/62
• [x] ufront-mvc - see: https://github.com/ufront/ufront-mvc/pull/72
• [x] ufront-ufadmin - see: https://github.com/ufront/ufront-ufadmin/pull/5
• [x] ufront-easyauth - see: https://github.com/ufront/ufront-easyauth/pull/9
• [x] ufront-mail - see: https://github.com/ufront/ufront-mail/pull/4

A lot of these projects are no longer maintained so we may need to create forks.

[Simn]

I have merged all of these PRs, let me know if you need anything else ufront-wise!

[tobil4sk]

Thanks!

[tobil4sk]

Reopening because the server still runs on Haxe 3... The legacy server would require some changes to compile with Haxe 4, or we can keep just that on Haxe 3.