wip/py-mozprocess 1.4.0 NetBSD

Mozprocess is a process-handling module that provides some additional features beyond those available with python's subprocess:

• better handling of child processes, especially on Windows
• the ability to timeout the process after some absolute period, or some period without any data written to stdout/stderr
• the ability to specify output handlers that will be called for each line of output produced by the process
• the ability to specify handlers that will be called on process timeout and normal process termination