Init scripts start logger that prints output of deamons into syslogs.
This logger is run with -p to attach tag. This tag is interpreted
as the process that produces the following message. In the many init
scripts this tag was set to wr-switch, incorrectly. This commit
corrects it to include the name of the daemon.

Until now configuration items like WRS_LOG_HAL could change only loglevel of
syslog messages, not the verbosity of the program.

Please note that all messages produced by programs if syslog is
configured will be passed to the syslog at the same <facility>.<level>
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

Substitude all occurrences of upper case strings like HOSTNAME, IPADDR and
MACADDR with the corresponding value. Before only first occurrence of each
was substituted
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>

This will allow users to have special configuration (that is not possible to
achieve by just using dot-config) without a need to manually handle custom
script.

The script can be used from /wr/bin/custom_boot_script.sh or downloaded during
the boot. It is not possible to execute a script which was downloaded during
the previous boot. But a script can be written in such way to copy itself to
/wr/bin/custom_boot_script.sh.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>