SAML SLO response data destination modification needed

On the IDP1 the following Irule has been modified to append the referer header to the PSOT request

when ACCESS_ACL_ALLOWED {

if { [HTTP::uri] contains "/logmeout"} {

    log local0. "logout requested from IP [IP::client_addr] URI [HTTP::uri] query [HTTP::query]"
    ACCESS::respond 307 Location "HTTPS://IDP2/saml/idp/profile/post/sls?[join "referer=[URI::encode [HTTP::header value "Referer"]]"https://myreferer"]"
    ACCESS::session remove

}
}