Mainmenu HTTP requests block singleplayer from starting

[AFCMS]

Minetest version

Minetest 5.6.1 (Linux)
Using Irrlicht 1.9.0mt8
Using LuaJIT 2.1.0-beta3
BUILD_TYPE=Release
RUN_IN_PLACE=0
USE_CURL=1
USE_GETTEXT=1
USE_SOUND=1
STATIC_SHAREDIR="/usr/share/minetest"
STATIC_LOCALEDIR="/usr/share/locale"

OS

Operating system: Ubuntu

Summary

I am often connected to the internet using a proxy server, and sometimes the proxy is "disabled" making any web request timeout.

I can start Minetest, but when I click on the "Play" button the game freeze for ~10s until the server-list request made in background timeout. (the log file shows this specific request timeout)

Steps to reproduce

• Have a network which let every request timeout.
• Open Minetest
• Quickly click the "Play" button of a singleplayer world
• See the game freeze