feat(deploys): Add new configuration options to Controller introduced in controller/#1099 (#551)

deis/controller#1099

Author: helgi

src/managing-workflow/tuning-component-settings.md

@@ -54,6 +54,8 @@ REGISTRATION_MODE                               | set registration to "enabled",
 GUNICORN_WORKERS                                | number of [gunicorn][] workers spawned to process requests (default: CPU cores * 4 + 1)
 RESERVED_NAMES                                  | a comma-separated list of names which applications cannot reserve for routing (default: "deis, deis-builder, deis-workflow-manager")
 SLUGRUNNER_IMAGE_NAME                           | the image used to run buildpack application slugs (default: "quay.io/deisci/slugrunner:canary")
+DEIS_DEPLOY_REJECT_IF_PROCFILE_MISSING          | rejects a deploy if the previous build had a Procfile but the current deploy is missing it. A 409 is thrown in the API. Prevents accidental process types removal. (default: "false", allowed values: "true", "false")
+DEIS_DEPLOY_PROCFILE_MISSING_REMOVE             | when turned on (default) any missing process type in a Procfile compared to the previous deploy is removed. When set to false will allow an empty Procfile to go through without removing missing process types, note that new images, configs and so on will get updated on all proc types.  (default: "true", allowed values: "true", "false")
 
 ### Global and per application settings