Link blogpost about redirecting stdout/stderr
Link blogpost about redirecting stdout/stderr

As not everyone may understand why it is tricky to redirect
`stdout`/`stderr` from C in Python, link Eli Bendersky's blog post about
why naive attempts to do this fail along with an explanation about what
is happening at the system level and how to redirect C `stdout`/`stderr`
correctly.

minrk/wurlitzer,minrk/wurlitzer