Merge branch 'maint'

* maint:
xdiff: Match GNU diff behaviour when deciding hunk comment worthiness of lines
Update cherry documentation.
Refer to git-rev-parse:Specifying Revisions from git.txt
git-fetch.sh printed protocol fix
RPM package re-classification.
Documentation: note about contrib/.
git-svn: fix symlink-to-file changes when using command-line svn 1.4.0
Set $HOME for selftests

diff --cc git-fetch.sh
Simple merge