An Irule for Client Ssl Profile that Allows Unassigned TLS Extension Values (17516)

I added this irule, it created an extension actually, but there was no data under it.

when CLIENTSSL_CLIENTHELLO { set my_ext "Hello world!" set my_ext_type 17516 SSL::extensions insert [binary format S1S1a* $my_ext_type [string length $my_ext] $my_ext] }