don't allocate BIGNUM on the stack on fedora 33 the BIGNUM type is opaque. Allocate always to avoid headaches.

add `require client ca' rule to require certs signed by a CA

improve logs management

reload configuration on SIGHUP

revert commit 346f28eeaa205d268d1e63c7ffd86cf041f6d1e6 keep mark_nonblock in utils.c, as otherwise the build for the regress suite will fail (mark_nonblock needs fatal which is in gmid.c, and we can't link gmid.o with the regress suite...)

move mark_nonblock to utils.c

ensure absolute paths in config-less mode

correct copyright date

use starts_with in puny.c