r3.in.xyz: unify keywords with r.in.lidar (https://trac.osgeo.org/grass/changeset/68596)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@68602 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/r3.in.xyz/r3.in.xyz.py

@@ -26,6 +26,10 @@
 #% keyword: import
 #% keyword: voxel
 #% keyword: LIDAR
+#% keyword: statistics
+#% keyword: conversion
+#% keyword: aggregation
+#% keyword: binning
 #%End
 #%Flag
 #% key: s