debian: Fill in gecos field for jenkins user

Otherwise when Jenkins runs git, git will complain that the identity is
not set up correctly and will fail.
Need to restore the owner of the describable list so that changes in subsequent sessions will be persisted.
(Issue not reproduced here, but was in similar ArtifactManagerConfiguration: 757fe0844ce0d53d08c9d762ddce4b1190ab8cd4.)
@since
Worth recording a UserInterruption even for the anonymous user.
If JenkinsLocationConfiguration.jenkinsUrl is still null, CoreEnvironmentContributor will silently skip several variables.
No obvious fix for that, but at least document it so it is not so surprising.
[FIXED JENKINS-16261] Defer JAR copying from MavenComputerListener.preOnline.
Close JarFile resources in PluginWrapper and UpdateCenter
fix computeRelativeNamesAfterRenaming for job tbs using same prefix in name
Fixed Brazilian Portuguese translation of "Full Log".

The translation was too literal: the log is not full as in a cup of water (this is what "cheio" means), it is full because it is not a partial object.
Comment.
[FIXED JENKINS-18775] Integrated XStream 1.4.4-jenkins-4 with attempted fix for race condition.
Merge pull request #921 from brauliobezerra/patch-1

Thanks
Merge REMERGE_HEAD into HEAD
[JENKINS-17248] Be robust against exceptions in ItemListener.onLoaded, since this could interrupt Jenkins startup.
[JENKINS-18775] [JENKINS-17248] Noting.
Merge pull request #591 from petere/debian-gecos

debian: Fill in gecos field for jenkins user
Merge pull request #918 from evernat/master

Close JarFile resources in PluginWrapper and UpdateCenter
Merge branch 'master' of github.com:jenkinsci/jenkins
Does not make much sense to put @DataBoundConstructor on an abstract class.
(Stapler 1.218 rejects it, I think correctly.)
Optimize String appends in hudson.Functions