IO::Socket::SSL isn't reusing the port

[jkominek]

pircd/pircd

Line 104 in c4352b1

Reuse => 1,

Reuse on the SSL socket doesn't work, which isn't a big surprise when you go looking at the code. Sigh.

[jkominek]

See https://metacpan.org/pod/IO::Socket::SSL#Basic-SSL-Server we need to implement the second option using start_SSL so we can control how the initial listening socket works.
once we have that, we could implement a STARTTLS command relatively easily.
conveniently, this would also let us use new X.509 certs for new connections, which was a concern for the old method.