IssueTracker

When deploying to production, we can set environment variables from the command line as follows:

`appcfg.py update -E KEY:VALUE .`

And these can then be accessed in the os environment, like `os.environ['KEY']` in python.

There is no such corollary in the dev_appserver that I am aware of, and dev_appserver appears to clobber any environment variables set on the OS itself.

I am unaware of any mechanism to pass arguments to the dev_appserver process using the command line. I would like a command line argument added to dev_appserver.py which provides this ability.

I am aware of the ability to set environment variables by editing the app.yaml file. This does not work for our use-case.