Merge pull request #1 from scoates/master

Use `env` for python path
Avoid local filesystem checks if redis server is not local

Prevent the RSS checks (which require opening /proc/`pid`/status) on the
local machine if the server IP (or hostname) is not local.

Allow these checks to be forced with `-L`.
Merge pull request #2 from fictivekin/localchecks

Avoid local filesystem checks if redis server is not local