Warnings.
[ZD-18406] Exception from add() due to misuse of Iterator.remove().
…	SEVERE	hudson.triggers.SafeTimerTask#run: Timer task com.cloudbees.jenkins.support.slowrequest.SlowRequestChecker@9a8afec failed
java.lang.IllegalStateException
	at java.util.LinkedHashMap$LinkedHashIterator.remove(LinkedHashMap.java:394)
	at com.cloudbees.jenkins.support.timer.FileListCap.add(FileListCap.java:58)
	at com.cloudbees.jenkins.support.slowrequest.SlowRequestChecker.doRun(SlowRequestChecker.java:66)
	at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:54)
	at …
FileListCap as written was useless, since it removed files from its internal list without ever actually deleting them from disk.
[maven-release-plugin] prepare release support-core-2.6