MINOR: quic: new_quic_cid() code moving

This function will have to call another one from quic_tls.[ch] soon.
As we do not want to include quic_tls.h from xprt_quic.h because
quic_tls.h already includes xprt_quic.h, let's moving it into
xprt_quic.c.
2 files changed