CLEANUP: assorted typo fixes in the code and comments

This is fifth iteration of typo fixes
diff --git a/contrib/spoa_server/ps_python.c b/contrib/spoa_server/ps_python.c
index 0a9fbff..2dbe5ee 100644
--- a/contrib/spoa_server/ps_python.c
+++ b/contrib/spoa_server/ps_python.c
@@ -50,7 +50,7 @@
 
 	if (!PyArg_ParseTuple(args, "sO!", &name, &PyFunction_Type, &ref))
 		return NULL;
-	Py_XINCREF(ref); /* because the function is intenally refrenced */
+	Py_XINCREF(ref); /* because the function is internally referenced */
 
 	ps_register_message(&ps_python_bindings, name, (void *)ref);
 
@@ -602,7 +602,7 @@
 		}
 	}
 
-	/* Dictionnary { args = <list-of-args> } for the function */
+	/* Dictionary { args = <list-of-args> } for the function */
 
 	fkw = PyDict_New();
 	if (fkw == NULL) {