saving uncommitted changes in /etc prior to emerge run

etckeeper/vcs.d/50vcs-cmd

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -e
+
+# check whether we can locate the vcs binary
+if [ -n "$VCS" ] && which "$VCS" > /dev/null; then
+        # pass commands to the VCS application
+        $VCS "$@"
+else
+	echo "error: VCS ($VCS) not set or not in PATH" >&2
+	exit 1
+fi