...like non-ASCII or too-long env var content on Linux

Change-Id: Ic2c536fa92b88108e96a0fc1a657180bc1906f01
Reviewed-on: https://gerrit.libreoffice.org/36067Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>