Better way to check required parameters in notification scripts

[B-LUC]

For mail-host-notificatiion.sh:

   for P in HOSTADDRESS LONGDATETIME HOSTNAME HOSTDISPLAYNAME HOSTOUTPUT HOSTSTATE USEREMAIL NOTIFICATIONTYPE
   do
        eval "PAR=\$${P}"
        if [ ! "$PAR" ]
        then
            Error "Parameter '$P' is missing"
        fi
   done

For mail-service-notification.sh:

    for P in HOSTADDRESS LONGDATETIME HOSTNAME HOSTDISPLAYNAME SERVICENAME SERVICEDISPLAYNAME SERVICEOUTPUT SERVICESTATE USEREMAIL NOTIFICATIONTYPE
    do
        eval "PAR=\$${P}"
        if [ ! "$PAR" ]
        then
            Error "Parameter '$P' is missing"
        fi
   done

[mcktr]

Since you already looked into the code of the notification scripts, could you provide a pull request? :)

[dnsmichi]

@mcktr if you want to dig into this ... otherwise close it. Thanks.