[trac2361] typo fix in comment

noticed this while editing file for previous commit

src/lib/python/bind10_config.py.in

@@ -51,7 +51,7 @@ def reload():
     #  tree the programs in the tree (not installed ones) will be used.
     #
     # B10_FROM_SOURCE_LOCALSTATEDIR is specifically intended to be used for
-    # tests where we want to use variuos types of configuration within the test
+    # tests where we want to use various types of configuration within the test
     # environment.  (We may want to make it even more generic so that the path
     # is passed from the boss process)
     if "B10_FROM_SOURCE" in os.environ: