Please add the mirror for Gentoo Linux

[XVilka]

Gentoo is a Linux distribution built using the Portage package management system. Unlike a binary software distribution, the source code is compiled locally according to the user's preferences and is often optimized for the specific type of computer. Precompiled binaries are available for some larger packages or those with no available source code.

There is a number of Gentoo mirrors around the globe, but in China there is only reliable is Tsinghua one. It would be amazing to mirror package trees as well. Setting up the mirror is straightforward, see Setting up the new mirror page.

[XVilka]

Seems it's already here:

• https://developer.aliyun.com/mirror/gentoo
• https://developer.aliyun.com/mirror/gentoo-portage

But it is not announced on the Gentoo page, it would be awesome to have it added there: https://www.gentoo.org/downloads/mirrors/