Eclipse CBI notes

Signed-off-by: Joakim Erdfelt <joakim.erdfelt@gmail.com>

pom.xml

@@ -1229,6 +1229,9 @@
       </build>
     </profile>
     <profile>
+      <!-- This profile is used exclusively on Eclipse CBI.
+           Various plugins and artifacts declared here only
+           exist on the Eclipse CBI infrastructure. -->
       <id>eclipse-sign</id>
       <activation>
         <property>
@@ -1252,6 +1255,7 @@
             </executions>
           </plugin>
           <plugin>
+            <!-- This plugin only exists on Eclipse CBI -->
             <groupId>org.eclipse.cbi.maven.plugins</groupId>
             <artifactId>eclipse-jarsigner-plugin</artifactId>
             <version>${cbi-plugins.version}</version>