fix for "skipusers" hard coding

releng.control/cc_config.xml

@@ -60,7 +60,7 @@
             <email
                 mailhost="localhost"
                 returnaddress="${env.BUILD_BUILDMASTER_EMAIL}"
-                skipusers="false"
+                skipusers="${env.SKIPUSERS}"
                 subjectprefix="[${project.name}]"
                 spamwhilebroken="false"
                 buildresultsurl="${env.BUILD_RESULT_URL}/${project.name}">

releng.control/commonVariations.shsource

@@ -30,3 +30,6 @@ export BUILD_BUILDMASTER_EMAIL=wtpBuild@eclipse.org
 export BUILD_RESULT_URL=http://build.eclipse.org:7777/cruisecontrol/buildresults
 export BUILD_TOADDRESS=david_williams@us.ibm.com
 
+# for  builds on local machines, SKIPUSERS should be 'true' to avoid 
+# notifying users about those builds on your local machine
+export SKIPUSERS=false
\ No newline at end of file

releng.control/somePathDirectory/commonVariations.shsource

@@ -34,3 +34,6 @@ export BUILD_BUILDMASTER_EMAIL=davidw@davidw.com
 export BUILD_RESULT_URL=http://davidw.com:7777/cruisecontrol/buildresults
 export BUILD_TOADDRESS=david_williams@us.ibm.com
 
+# for  builds on local machines, SKIPUSERS should be 'true' to avoid 
+# notifying users about those builds on your local machine
+export SKIPUSERS=true
\ No newline at end of file