GitLab CI pipelines do not currently include a Linux job that would have
GSSAPI support disabled. Add the "--without-gssapi" option to the
./configure invocation on Debian 9 to address that deficiency and also
to continuously test that build-time switch.
(cherry picked from commit
a3957af864eeebd925ee18c10d305024d4d99fc4)
variables:
CC: gcc
CFLAGS: "${CFLAGS_COMMON} -O2"
+ EXTRA_CONFIGURE: "--without-gssapi"
<<: *debian_stretch_amd64_image
<<: *build_job