Instead, admins are specified using a JSON file, 'admins.json'. This file is
gitignored. If it is not present, there is a default list of admins in
'admins.default.json'.
./script/zed-local now looks for "--zed2" flag in its args and runs Zed2 binaries instead of zed1.
'foreman start' can be launched with '-f Procfile.zed2" argument to launch zed2 collab server.