improve in-source documentation of stage_reverify

lib/wsapi/stage_reverify.js

@@ -11,7 +11,8 @@ email = require('../email.js'),
 sanitize = require('../sanitize'),
 config = require('../configuration');
 
-/* Stage an email for addition to a user's account.  Causes email to be sent. */
+/* Stage an email for re-verification (i.e. after account password reset).
+ * Causes an email to be sent. */
 
 exports.method = 'post';
 exports.writes_db = true;