If the build or image is broken and sdb-read is missing don't try to
overwrite hwinfo
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Forward messages from scripts running before syslog is available
to the kernel log. Before these messages were printed only to the
console.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

When switch's firmware with buildroot older than 2016.02 was updated via
copying wrs-firmware.tar with buildroot at least 2016.02 to the
/update partition, then hwinfo in the flash was overwriten.
Such behaviour was caused by crashing during execution of /wr/bin/sdb-read.
Crashing sdb-read caused the following if's condition from the file
/etc/init.d/hwinfo to be false.

if /wr/bin/sdb-read /dev/mtd5ro > /dev/null; then

This triggered later overwrite of hwinfo partition.

/wr/bin/sdb-read was crashing because during update the binary /wr/bin/sdb-read
was called from just extracted firmware. Problem pops up when libraries
required by sdb-read are in the different versions in the old and the new
firmware. Unfortunatelly, this problem cannot be easily solved, since we cannot
change the update procedure in already installed firmware (the one that is
performing update).

Implemented solution does the following:
--change the name of /wr/etc/sdb-for-dataflash to /wr/etc/sdb-for-dataflash.bin
  by this /etc/init.d/hwinfo script exits with an error without modification
  to the hwinfo partition.
--rename link /etc/rcS/S90hwinfo to /etc/rcS/S10hwinfo, which will trigger
  update of hwinfo partition earlier during the boot.
--restart switch after update of hwinfo in the flash
--remove calls of /etc/init.d/hwinfo during the update
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Before at the beginnig of the hwinfo script, hwinfo_error was written to the status file.
Then if there was success or warning then update was written to status file.
Snmpd could read error even there was no error.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Move:
/etc/init.d/[SK]??<name> to /etc/init.d/<name>
Then create symlinks in
/etc/init.d/rcS/[SK]??* to all files that previously were /etc/init.d/[SK]??*
With exception of monit since monit will start soon from init.

Rename all occurences of changed files.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

To be used by SNMP.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The binary file commited here is the same as in binaries/: it is generated
as described in commit 7c9f0d35.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>