Move entries older than last year to changelog-old

The current changelog is *more than twice as long* as the "archive".
So it could really use some trimming. I propose to always keep the
current and previous years' entries.

Second half of the change: Remove the old entries (2012 and older).
[FIXED JENKINS-19310] Provide correct links for build history inside a folder.
The basic fix is to use ${rootURL} plus full model object URLs rather than relying on ${jobBaseUrl}.
This is made trickier by the fact that the model object URLs are computed inside ProgressiveRendering.compute,
and therefore will not be correct when nondefault views are in the crumb trail unless the original request information is present.
So modifying ProgressiveRendering to preserve a copy of the original request for use during computation.
(This could probably be used to simplify parts of AsynchPeople as well.)
Also improving AbstractItem.getUrl to properly construct a URL including views even when the current page is not inside the item;
it should suffice for some ancestor of the current item (or a view thereof) to be in the ancestor list of this page.
Merge commit 'ea95434938b2111d8768528823990a78bdc58d3e'
the trunk is toward 1.569-SNAPSHOT
Merge REMERGE_HEAD into HEAD
[JENKINS-19310] Unreproducible failure of DirectlyModifiableViewTest.failWebMethodForIllegalRequest, probably from a StackOverflowError.
	at …
	at hudson.model.View.toString(View.java:514)
	at java.text.MessageFormat.subformat(MessageFormat.java:1246)
	at java.text.MessageFormat.format(MessageFormat.java:836)
	at java.text.Format.format(Format.java:140)
	at java.text.MessageFormat.format(MessageFormat.java:812)
	at java.util.logging.Formatter.formatMessage(Formatter.java:130)
	at java.util.logging.SimpleFormatter.format(SimpleFormatter.java:63)
	at java.util.logging.StreamHandler.publish(StreamHandler.java:179)
	at java.util.logging.ConsoleHandler.publish(ConsoleHandler.java:88)
	at java.util.logging.Logger.log(Logger.java:481)
	at java.util.logging.Logger.doLog(Logger.java:503)
	at java.util.logging.Logger.log(Logger.java:567)
	at hudson.model.AbstractItem.getUrl(AbstractItem.java:423)
	at hudson.model.View.getViewUrl(View.java:510)
	at hudson.model.View.toString(View.java:514)
	at …
Reusable API documentation: <st:include page="/hudson/model/ModifiableItemGroup/_api.jelly"/>
[FIXED JENKINS-20327] When saving a list view, submit POST data with size proportional to the # of jobs selected for inclusion, not the number of options.
This can be done easily by setting json="true"; otherwise the default is to pass =false for each unselected job.
Ironically, even with this fix we are sending 2× what is needed,
since currently ListView.submit does not even check the json parameter for job names:
it only pays attention to top-level request parameters that the browser defines for selected checkboxes.
Ideally we could ask buildFormTree to ignore a given form element entirely, so as to avoid the wasted data.
[JENKINS-23365] Noting some nullness conditions; calcRevisionsFromBuild in particular is tricky.
JENKINS-22028 was only fixed in 1.565
Merge REMERGE_HEAD into HEAD
JENKINS-22867 was only fixed in 1.565
Fix translation error
Automatically disable test timeout when running in a debugger.
(cherry picked from commit abf335933388f0ce28edfb86dbe80972f3280e47)
[JENKINS-23365] Follow-up API fixes: introduce SCM.getKey(), and add an SCMRevisionState baseline argument to checkout.
Necessary in order to produce correct changelogs by SCM plugins which actually use SCMRevisionState correctly (unlike git-plugin!).
(cherry picked from commit df9dc4c850374daeeda72ee37177ba1fe2bcebd6)
Merge pull request #1271 from bkmeneguello/portuguese-translation

Fix translation error
Improved robustness of RunParameterValue so it does not break the REST API when there is invalid data.
Observed in 1.554.1:
java.lang.ArrayIndexOutOfBoundsException: 1
        at hudson.model.RunParameterValue.getNumber(RunParameterValue.java:63)
Established test baseline for Items.getAllItems with sorting.
What I hope is a more efficient Items.getAllItems, using a simpler sorting method.
Cf.: https://github.com/jenkinsci/metrics-plugin/commit/b7a2f58c977c8d1053d702e36dcc36bb1348e1aa
Merge pull request #1224 from daniel-beck/trim-changelog

Move entries older than last year to changelog-old