414635 Modular start.d and jetty.base property

Added more info in README.TXT files

jetty-distribution/src/main/resources/start.d/README.TXT

@@ -0,0 +1,26 @@
+
+This start.d directory contains modular ini files that are appended to the effective command line
+used to start jetty by the command:
+
+  java -jar start.jar
+
+
+The modules are executed in alphabetic order and the 'NNN-' prefixes are a convention to make that ordering
+explicit regardless of module name.
+
+All modules ending with '.ini' will be executed and it is a convention that disabled modules are renamed to
+end with '.ini.disabled'.   The start.jar mechanism can be used to enable/disable modules with commands like:
+
+  java -jar start.jar --enable=ssl --enable=spdy
+
+Note that the numeric prefix can be skipped in such commands.
+
+
+The ini modules have a simple dependency mechanism so a module can declare if it depends on or conflicts with
+other modules.  For example the spdy module includes the entries:
+
+    EXCLUDE=https
+    DEPEND=npn,ssl
+
+This says that spdy cannot be used with the https module (both use the same port and spdy provides https) and
+that the npn and ssl modules must also be enabled. 

jetty-distribution/src/main/resources/webapps.demo/README.TXT

@@ -3,5 +3,10 @@ This directory is scanned by the demo WebAppDeployer provider
 created in the etc/jetty-demo.xml file and enabled by the 
 start.d/900-demo.ini file.
 
-For normal deployment, use the webapps directory.
+To disable the demo, either remove the start.d/900-demo.ini or issue the following command:
+
+  java -jar start.jar --disable=demo
+
+
+For normal webapp deployment, use the webapps directory.
 

jetty-distribution/src/main/resources/webapps/README.TXT

@@ -23,3 +23,11 @@ only the XML is deployed (which may use the war in its configuration).
 This directory is scanned for additions, removals and updates 
 for hot deployment.
 
+To configure the deployment mechanism, edit the files:
+   start.d/500-deploy.ini
+   etc/jetty-deploy.ini
+
+To disable the auto deploy mechanism use the command:
+
+   java -jar start.jar --disable=deploy
+