Auto instrument packages with breakpoints

[willfaught]

A flag that auto instruments packages with breakpoints instead of printing a warning would be useful. Something like:

Before:

godebug run main.go
godebug run: Ignoring breakpoint at foo.com/bar/baz.go:100 because package "bar" has not been flagged for instrumentation. See 'godebug help run'.

After:

godebug run -autoinstrument main.go
godebug run: Ignoring breakpoint at foo.com/bar/baz.go:100 because package "bar" has not been flagged for instrumentation. See 'godebug help run'.

Perhaps it should even be the default, and you should have to disable it with -noautoinstrument?