Allow configuration of context path

It can be useful to be able to define the context path that jetty will use for the application - for example, if you are running apache in front of jetty for development.

The context path could be specified in the following locations:
1. System property
2. application.properties
3. Config.groovy

If not specified in one of these, then it should default to what it does now, 'grailsAppName'.

Some sample code:

In RunApp.groovy:

Change the runApp target to derive the context path:

// Get the application context path by looking for a property named 'app.context' in the following order of precedence:
// System properties
// application.properties
// config
// default to grailsAppName if not specified

props = Ant.antProject.properties

appContext = System.getProperty("app.context")
appContext = appContext ? appContext : props.'app.context'
appContext = appContext ? appContext : config.app.context
appContext = appContext ? appContext : grailsAppName

if(!appContext.startsWith('/')) {
appContext = "/$

")

Now, you can affect the context path in 1 of 3 ways:

1. grails -Dapp.context=mycontext run-app
2. in application.properties, define property:
app.context=mycontext
3. in Config.groovy define the app.context property:
environments {
development

}

I've attached a modified version of the grails-1.0 RunApp.groovy file for comparison.

For more information, see
http://www.javathinking.com/?p=49
http://www.nabble.com/Defining-the-context-path-in-application.properties-td12976557.html

Thanks.