check_ircd: improve cross-POSIX-platform support

check_ircd

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 botname=nagiosbot
 host=localhost
@@ -28,7 +28,8 @@ function delay {
 
 SECONDS=0
 echo "NICK $botname
-USER $botname 8 * : $botname" | nc -i 1 -q $crit -w $crit $host $port 2>&1 > /dev/null
+USER $botname 8 * : $botname
+QUIT" | nc -i 1 -w $crit $host $port 2>&1 > /dev/null
 exit=$?
 if [ ! "$exit" == 0 ]; then
 	echo "IRCd CRITICAL: $host: connection failed"