[PATCH 1 of 2] Documenting comment

[Wald Commits]

# HG changeset patch
# User Tom Gottfried <tom at intevation.de>
# Date 1516122834 -3600
# Node ID 89dcaae0801cc2fa1ae9163643d3323f03642c57
# Parent  890f708b18d68cc99723c5bbbf5018036785f9dd
Documenting comment.

diff -r 890f708b18d6 -r 89dcaae0801c gwt-client/src/main/webapp/WEB-INF/web.xml
--- a/gwt-client/src/main/webapp/WEB-INF/web.xml	Fri Jan 12 17:07:42 2018 +0100
+++ b/gwt-client/src/main/webapp/WEB-INF/web.xml	Tue Jan 16 18:13:54 2018 +0100
@@ -40,6 +40,8 @@
     </context-param>
 
     <context-param>
+         <!-- Set this to 'was' or 'ggina' to use the GGinA authenticator
+              or to 'plain' to use a local flys_user_file. -->
         <param-name>authentication</param-name>
         <param-value>plain</param-value>
     </context-param>