Update uwsgi.ini to use multiple processes on a multi-core host
Update uwsgi.ini to use multiple processes on a multi-core host

As suggested by Christian Hammond in https://groups.google.com/forum/#!topic/reviewboard/SOn5c1BFE00

The 'processes' property is set to %k meaning the number of cores. See https://uwsgi-docs.readthedocs.io/en/latest/Configuration.html#magic-variables.

ikatson/docker-reviewboard,ikatson/docker-reviewboard