Capture stdout and stderr to logfile

Nexus 3 has no default log that captures stdout/stderr. This means that the most reliable way to get a thread dump from a hung instance (kill -3) will not work.

This is a regression from Nexus 2, and has serious implications for support. Other methods of getting thread dumps such as jstack require that a JDK is available, and even when these tools are available they are not as reliable as sending a SIGQUIT.

Acceptance

Output written to stdout and stderror are written to the standard logs