upgrade to ownCloud 8.0.2

The contacts and calendar apps are now maintained outside of ownCloud core, so we now pull them in from github tags and must enable them explicitly.

setup/functions.sh

@@ -179,3 +179,21 @@ function input_menu {
 	result=$(dialog --stdout --title "$1" --menu "$2" 0 0 0 $3)
 	result_code=$?
 }
+
+function git_clone {
+	# Clones a git repository, checks out a particular commit or tag,
+	# and moves the repository (or a subdirectory in it) to some path.
+	# We use separate clone and checkout because -b only supports tags
+	# and branches, but we sometimes want to reference a commit hash
+	# directly when the repo doesn't provide a tag.
+	REPO=$1
+	TREEISH=$2
+	SUBDIR=$3
+	TARGETPATH=$4
+	TMPPATH=/tmp/git-clone-$$
+	rm -rf $TMPPATH $TARGETPATH
+	git clone -q $REPO $TMPPATH || exit 1
+	(cd $TMPPATH; git checkout -q $TREEISH;) || exit 1
+	mv $TMPPATH/$SUBDIR $TARGETPATH
+	rm -rf $TMPPATH
+}