add text about implicit access token refresh OIDCUserInfoRefreshInterval
# The refresh interval in seconds for the claims obtained from the userinfo endpoint
# When not defined the default is 0, i.e. the claims are retrieved only at session creation time.
+# If refreshing fails, it is assumed that the access token is expired and an attempt will be made
+# to refresh the access token using the refresh token grant, after which a second attempt is made
+# to obtain claims from the userinfo endpoint with the new access token.
# NB: this can be overridden on a per-OP basis in the .conf file using the key: userinfo_refresh_interval
#OIDCUserInfoRefreshInterval <seconds>
