Bug 29207: Getopt::Long should not ignore cases

Bug 29207: Getopt::Long should not ignore cases

To avoid Getopt::Long treating upper case and lower case options,
this patch restores removed ":config no_ignore_case".

Steps to reproduce:
1. Start koha-z3950-responder deamon for any instance.
2. Check z3950.log log file, there should be
"[fatal] Failed to listen on ...-koha-z3950" in it.
3. Alternatively you can "curl localhost:2100/biblios?version=1.1 -v"
to ensure that it doesn't work "Failed to connect to localhost
port 2100: Connection refused".
4. Apply the patch.
5. Stop and start daemon again.
6. Check the logs again, there should be no new error there.
7. Same way do the curl to ensure that this time it listens on that port.

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>