DoT with unbound

[Havard Eidnes]

Continuing:

I added logging of successful accept()s in
comm_point_perform_accept(), and this resulted in:

% time kdig @158.38.0.1 +timeout=120 +tls vg.no. a
;; Time 2019-11-24 15:37:26 CET
;; From 158.38.0.1 at 853(TCP) in 5.2 ms
0.003u 0.003s 0:12.62 0.0%      0+0k 0+0io 0pf+0w

and this in the log:

Nov 24 15:37:39 oliven unbound: [15650:0] notice: accept ok from ip4 158.38.62.77 port 64691 (len 16)
Nov 24 15:37:39 oliven unbound: [15650:0] notice: ssl handshake with ip4 158.38.62.77 port 64691 (len 16)
Nov 24 15:37:39 oliven unbound: [15650:0] notice: ssl handshake with ip4 158.38.62.77 port 64691 (len 16)

So, apparently, unbound is sometimes slow in doing accept() of
new connections.  Why?

Regards,

- Håvard