98usrmount/mount-usr.sh: honor fs_passno in /etc/fstab

If the sixth field in /etc/fstab is "0" or not present for /usr, do not
run fsck.

This prevents fsck for nfs /usr also.

modules.d/98usrmount/mount-usr.sh

@@ -7,9 +7,9 @@ type fsck_single >/dev/null 2>&1 || . /lib/fs-lib.sh
 
 mount_usr()
 {
-    local _dev _mp _fs _opts _rest _usr_found _ret
+    local _dev _mp _fs _opts _rest _usr_found _ret _freq _passno
     # check, if we have to mount the /usr filesystem
-    while read _dev _mp _fs _opts _rest; do
+    while read _dev _mp _fs _opts _freq _passno; do
         if [ "$_mp" = "/usr" ]; then
             case "$_dev" in
                 LABEL=*)
@@ -21,7 +21,7 @@ mount_usr()
                     _dev="/dev/disk/by-uuid/${_dev#UUID=}"
                     ;;
             esac
-            echo "$_dev ${NEWROOT}${_mp} $_fs ${_opts} $_rest"
+            echo "$_dev ${NEWROOT}${_mp} $_fs ${_opts} $_freq $_passno"
             _usr_found="1"
             break
         fi
@@ -29,7 +29,11 @@ mount_usr()
 
     if [ "x$_usr_found" != "x" ]; then
         # we have to mount /usr
-        fsck_single "$_dev" "$_fs"
+        if [ "x0" != "x${_passno:-0}" ]; then
+            fsck_single "$_dev" "$_fs"
+        else
+            :
+        fi
         _ret=$?
         echo $_ret >/run/initramfs/usr-fsck
         if [ $_ret -ne 255 ]; then