files; allow unsafe paths to be overridden under certain conditions. ONLY the root project can use the flow build flag and explicit command line flag. see extended desc.

to force allowing unsafe paths there are two conditions:
1. root project file only can specify a flow config node for
files_allow_unsafe_paths to true
2. --files-allow-unsafe-paths must be explicitly added on the cli

This also logs all files that are listed as unsafe while parsing them,
and adds clear warnings as to what is happening.

flow: {
build: {
files_allow_unsafe_paths : true
}
},