Looks like there is bug in tls code w/ fr_nonblock

Looks like there is bug in tls code w/ fr_nonblock

With that RADSEC is not working at all. The issue is in this commit:
https://github.com/FreeRADIUS/freeradius-server/commit/b6d7249be1958d0080187846d8bab1f0fae6b857

it pretends to revert erroneously deleted lines from another commit:
https://github.com/FreeRADIUS/freeradius-server/commit/f9c2f5a55d2df71979d99708f83d52336e44ad00

The thing is that it is not only reverting deleted lines, it also adds fr_nonblock(fd) call in tls_new_client_session.
Was that done by mistake? With that SSL_connect exits immediately while we are trying to send initial Access-Request
packet in proxy_tls_send. Of course at the this time the handshake is not yet finished and SSL_connect returns with an
error.  SSL_connect will return success just on the following reads in proxy_tls_recv. But here we are in the recv
callback, handlshake is done... so what, we don't have any packet to send. I have deleted this fr_nonblock(fd) call
meanwhile.