weavejester
Added ability to specify context-params in the project file.
If you're building a project which may be delivered as an executable jar file, it's obvious that parameters can (and should) be supplied as environment variables. However, if you're delivering a project as a war file to be run within a servlet container, this isn't really possible as the war file may be deployed into an already running servlet engine whose environment variables one cannot readily alter.
While I agree that passing parameters as context-params in the web.xml file violates the principles of the 12 factor app, it is a well established mechanism for specifying parameters within the context of a web-app packaged as a war.
This patch provides a mechanism for specifying context parameters in the :ring map of the project.clj file. A key :context-params may be specified in this map; if it is specified, and its value is a map, then a context-param element will be generated in the generated web.xml file for each key/value pair in that map.
