[OPENJDK-1961] Document MAVEN_REPO_URL and MAVEN_REPO_ID

Signed-off-by: Jonathan Dowland <[email protected]>

Author: jmtd

modules/maven/default/module.yaml

@@ -50,6 +50,17 @@ envs:
 - name: MAVEN_LOCAL_REPO
   description: Directory to use as the local Maven repository.
   example: /home/default/.m2/repository
+- name: "MAVEN_REPO_URL"
+  example: "http://repo.example.com:8080/maven2/"
+  description: >
+    Specify a Maven repository by URL.
+    See MAVEN_REPOS for specifying multiple repositories.
+- name: "MAVEN_REPO_ID"
+  example: "myrepo"
+  description: >
+    Provide a static ID for the Maven repository specified by
+    MAVEN_REPO_URL. The default is to generate a random ID.
+    See MAVEN_REPOS for specifying multiple repositories.
 - name: "MAVEN_REPOS"
   example: "dev-one,qe-two"
   description: "If set, multi-repo support is enabled, and other MAVEN_REPO_* variables will be prefixed. For example: DEV_ONE_MAVEN_REPO_URL and QE_TWO_MAVEN_REPO_URL"