support old getent implementation

gencert.sh

@@ -176,7 +176,8 @@ extendedKeyUsage = serverAuth"
     # Gather IPs for SAN
     
     i=1
-    IPS="$(getent ahostsv4 $(hostname) | awk '{print $1}' |sort | uniq)"
+    IPS="$( (getent ahostsv4 $(hostname) 2>/dev/null || getent hosts $(hostname) 2>/dev/null) | awk '{print $1}' |sort | uniq)"
+
     echo "[${ME}] Found these IPs: " ${IPS}
     PAYLOAD="subjectAltName = @alt_names\n[ alt_names ]\n$(for IP in $IPS; do echo "IP.${i} = ${IP}" ; i=$((i + 1)); done)"
   fi