[WFCORE-4396] Use HTTPS for repository and pluginRepository URLs

Allow configuration via -D of the protocol used or even the full URL. This allows folks who use a maven proxy to continue to do so.

pom.xml

@@ -93,6 +93,14 @@
 
         <server.output.dir.prefix>wildfly-core</server.output.dir.prefix>
 
+        <!-- Protocol to use for communication with remote maven repositories.
+             You can set to 'http' if you are using a maven proxy and 'https'
+             interferes with that. Use 'https' for builds that will be released
+             to non-snapshot public maven repos -->
+        <maven.repository.protocol>https</maven.repository.protocol>
+        <!-- The full remote maven repo URL; can be overridden via -D for special use cases -->
+        <maven.repository.url>${maven.repository.protocol}://repository.jboss.org/nexus/content/groups/public/</maven.repository.url>
+
         <!-- Surefire args -->
         <surefire.jpda.args></surefire.jpda.args>
         <surefire.system.args>${modular.jdk.args} ${modular.jdk.props} -ea -Duser.region=US -Duser.language=en -Duser.timezone=America/Chicago -XX:MaxMetaspaceSize=256m
@@ -2024,7 +2032,7 @@
             </snapshots>
             <id>jboss-public-repository-group</id>
             <name>JBoss Public Repository Group</name>
-            <url>http://repository.jboss.org/nexus/content/groups/public/</url>
+            <url>${maven.repository.url}</url>
             <layout>default</layout>
         </repository>
     </repositories>
@@ -2040,7 +2048,7 @@
             </snapshots>
             <id>jboss-public-repository-group</id>
             <name>JBoss Public Repository Group</name>
-            <url>http://repository.jboss.org/nexus/content/groups/public/</url>
+            <url>${maven.repository.url}</url>
         </pluginRepository>
     </pluginRepositories>