[JENKINS-2673] Clarify that suggestion means polling just once per hour
[JENKINS-23774] Better report the case that the incoming web request has no Referer header set.
Updated Javadoc of AntClassLoader2.
JUnit 4.
The JNLP port is not interesting enough to warrant logging at INFO during every startup, including the vast majority of functional tests which do not even use JNLP slaves.
Toning down some uninteresting logging which just clutters test runs.
[JENKINS-14749] Temporarily work around CSS errors by just suppressing the warnings until they can be fixed.
[JENKINS-14749] Suppress warnings about expected exception from prototype.js#HAS_EXTENDED_CREATE_ELEMENT_SYNTAX.
FingerprintCleanupThread ought to write messages to its saved log file.
Report a warning to build log when the selected JDK cannot be found.
[FIXED JENKINS-17667] Fixed race condition when running tool installers on many slaves at once.
Correcting change made in #1176, which introduced an NPE, to restore original logic merely wrapped in a synchronized block.
Reproduced NPE in new functional test (original bug probably very hard to reproduce).
Merge pull request #1318 from daniel-beck/JENKINS-2673

[JENKINS-2673] Clarify that suggestion means polling just once per hour