v4.0.0-rc2

Changes since v4.0.0-rc1

• Correctly delete symlinks on windows (resolves #801)
• support getting ERL_DIST_PORT from vm.args -erl_epmd_port argument
• move create_RELEASES function to relx
• Adding powershell start scripts for windows, fix nodetool ping output
• Windows: Fix issue on making junctions on paths with spaces
• otp-23 support fix: don't use undefined for longname remote shell
• otp-23 support and new env var ERL_DIST_PORT
• unquote MAYBE_DIST_ARGS in extended start script so they work
• fix timeout environment variable in erl_call
• add overlay var for each application in the release
• use RELX_RPC_TIMEOUT in nodetool for timeout
• Replace extended start script tests in Common Test with ones using shelltestrunner
• use with erl_call and builtin nodename in remsh
• Fix foreground subcommand with shell/input
• fix heart command setup and the reboot test of it