add config option socket, rework example config and release 1.0.0

misc/openrc/pymodmilter.initd

@@ -1,12 +1,11 @@
 #!/sbin/openrc-run
 
 user=${USER:-daemon}
-socket="${SOCKET:-}"
 milter_opts="${MILTER_OPTS:-}"
 
 pidfile="/run/${RC_SVCNAME}.pid"
 command="/usr/bin/pymodmilter"
-command_args="-s ${socket} ${milter_opts}"
+command_args="${milter_opts}"
 command_background=true
 start_stop_daemon_args="--user ${user}"