Allow gc to remove test results from memory as these can consume a lot o...

Solves the issue for newly created builds by not attempting to persist the original file upload record, which is useless after the build has run (the fileParameters dir in the build already archives them).
Does not help loading pre-fix builds in which the upload temp file has been deleted; for these, you must manually delete <file class="org.apache.commons.fileupload.disk.DiskFileItem" serialization="custom">…</file> from the build.xml.
(Did not find a straightforward way to just instruct XStream to ignore this bit of XML: it is easy to avoid serializing a field, but deserializing is different.)

[JENKINS-1295] Disable trigger downstream for maven jobs
Thanks !

Added reason for why we are rebuilding to the log message
Thanks !

Feature cli list jobs

[FIXED JENKINS-15940] WARNING: Caught exception evaluating: descriptor.getHelpFile(attrs.field). Reason: java.lang.NullPointerException

Require UPLOAD_PLUGINS permission for install-plugin cli command
Thanks !

minor textual improvements on Manage Jenkins page to improve appearance
Thanks

Added a trailing period to english AboutJenkins.Description because it
was the only message on that page having none.

this changes the rendering from
  ...functionality of Jenkins.(updates available)
to 
  ...functionality of Jenkins. (updates available)
which looks nicer.

Had to use  , regular whitespace wouldn't do.

German translations for AboutJenkins and OldDataMonitor links
Thanks

Otherwise it's not very obvious how the job name is in the abc/def/ghi notation
that's used in CLI and such.

[FIXED JENKINS-15839] wrong unicode characters on german Manage Jenkins page

page

the german translations used the character codes CEDILLA (00B8) and PER
MILLE SIGN (2030) instead of LATIN SMALL LETTER U WITH DIAERESIS (00FC)
and LATIN SMALL LETTER A WITH DIAERESIS (00E4)

These versions have a better API that supports Channels in general, not
just SlaveComputer.