Bug 22396: Make koha-sip set KOHA_HOME and KOHA_CONF correctly

Bug 22396: Make koha-sip set KOHA_HOME and KOHA_CONF correctly

This patch corrects a typo, and exports KOHA_CONF as other scripts do.

To test:
- Apply this patch
- Run:
  $ # in kohadevbox
  $ perl misc4dev/cp_debian_files.pl
- Try the new script
  $ sudo koha-sip --start kohadev
=> SUCCESS: tail -f /var/log/koha/kohadev/sip* doesn't show fatal errors
anymore
- Sign off :-D

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>