New command `idesl-get-ilom-address` to find the SP address given a host name.

Use it in `ilom-console-history` and `ilom-dsh`.
This should be fixed sooner or later, as it is still IDESL-specific.
idesl-nodename-to-hostname: Fix selection of long/short output format.
New command `idesl-hostname-to-nodename`.

Perform the translation from short names `nXXX` to long-form names `rXXcYYbZZnWW`.
As the command name says, this translation is specific to the UZH Schroedinger cluster.
idesl-nodename-to-hostname: Add option to print IPv4 address.

Also, print argument name before result if more than one arg is given.
(This is what `grep` etc. do.)