[iri] accept also : and @ again, to be RFC3986 compliant.

don't %-decode the query

alter the string, don't advance pointer if we advance the pointer, we crash during reload due to an invalid address given to free. altering the string is the way.

missing argument for LOGI

avoid race-condition what if we receive a SIGHUP right after unblock_signal (or during the whole block_signals...unblock_signals) but *before* the wait_sighup? Yeah.

improve manpage

add compat for setproctitle This adds a check for setproctitle and for the (linux) prctl PR_SET_NAME. If setproctitle is not available, on linux we provide an implementation that use prctl (taken from tmux compat layer.)

mention configuration reload

mention SIGHUP in manpage

reload configuration on SIGHUP

use upper bound given by poll it's a waste to loop through all fds. We know the *exact* number of clients that needs attention, so use that information to limit the looping.

drop unnecessary check around close

refactor executor_main now it's symmetrical to listener_main().

refactoring startup logic

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...)