Add a way to specify if a custom environment requires reloading support

There is a undocumented grails configuration parameter, which alllows to activate GSP reloading for a custom environment
(just put the parameter in your custom env. config section in Config.groovy):

grails.gsp.enable.reload=true

But reloading for controllers, domain-object, services doesn't work currently. The documented system properties
"disable.auto.recompile", " recompile.frequency" doesn't seem to have any meaning for a custom environment ?

Moving non-critical issues that aren't going to make it into 1.1 to 1.2

This is pretty critical for me, as I run my integration tests against a test environment and having to kill and rerun the server every time I fix a test is very slow.

I tried this with 1.2.0RC1, but it did not recompile.

grails -Dgrails.env=test -Ddisable.auto.recompile=false run-app

Still the same with grails-1.2.2. I wonder about the 'minor' priority, and could imagine many scenarios where this hurts...

Verified, this doesn't work:

grails -Dgrails.env=myEnvironment -Ddisable.auto.recompile=false run-app

The grails environment must be "development" or auto recompile / reload of classes and GSPs does not occur. Doc page:

http://www.grails.org/doc/1.0.x/ref/Command%20Line/run-app.html

Reloading support also does not work if you change the port number that tomcat is running on ...