s6-fdholder-daemon: usage: s6-fdholder-daemon [ -v verbosity ] [ -d | -D ] [ -1 ] [ -c maxconn ] [ -n maxfds ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] [ -t timeout ] [ -T lameducktimeout ] [ -i rulesdir | -x rulesfile ] path