First of all clone Cvet's FOnline
git clone https://github.com/cvet/fonline
now checkout 412 revision by sha commit (you can use git log to pick up another commit)
cd fonline
git checkout 3e58c94f1234173d5af234eb1f80ad0af8f3c120
git lfs checkout
ls
commit 3e58c94f1234173d5af234eb1f80ad0af8f3c120 is r513 which is the legacy r412 (Thanks wipe for pointing it out)
I've been successful with compilation using VS10 solutions... I've replaced the binaries from my project with the new one... I now have full control over my sandbox (THANKS to CVET and every people who contribute/d to FOnline.)
Only problem is that there is no script to build for linux in that state...
*.cbp file are code block project and these contains linux build environment...
Enjoy