include text on relative OIDCRedirectURI in sample .conf
# The redirect_uri for this OpenID Connect client; this is a vanity URL
# that must ONLY point to a path on your server protected by this module
# but it must NOT point to any actual content that needs to be served.
+# You can use a relative URL like /protected/redirect_uri if you want to
+# support multiple vhosts that belong to the same security domain in a dynamic way
#OIDCRedirectURI https://www.example.com/protected/redirect_uri
# (Mandatory)
# (Optional)
# Specify the domain for which the "state" and "session" cookies will be set.
# This must match the OIDCRedirectURI and the URL on which you host your protected
-# application. When not defined the default is the server hostname.
+# application. When using a relative OIDCRedirectURI this setting should most probably empty.
+# When not defined the default is the server hostname that is currently accessed.
#OIDCCookieDomain <cookie-domain>
# (Optional)
