Do generate error when hostonly_cmdline is set to "no"

Reference: bsc#1048748

dracut.conf.5.asc

@@ -97,7 +97,7 @@ Configuration files must have the extension .conf; other extensions are ignored.
     instead of a generic host and generate host-specific configuration.
 
 *hostonly_cmdline=*"__{yes|no}__"::
-    If set, store the kernel command line arguments needed in the initramfs
+    If set to "yes", store the kernel command line arguments needed in the initramfs
 
 *persistent_policy=*"__<policy>__"::
     Use _<policy>_ to address disks and partitions.

dracut.sh

@@ -1688,7 +1688,7 @@ if ! ( echo $PARMS_TO_STORE > $initdir/lib/dracut/build-parameter.txt ); then
     exit 1
 fi
 
-if [[ $hostonly_cmdline ]] ; then
+if [[ $hostonly_cmdline == "yes" ]] ; then
     unset _stored_cmdline
     if [ -d $initdir/etc/cmdline.d ];then
         dinfo "Stored kernel commandline:"