rem: usr: Move contributed DLZ modules into a separate repository

The DLZ modules are poorly maintained as we only ensure they can still
be compiled, the DLZ interface is blocking, so anything that blocks the
query to the database blocks the whole server and they should not be
used except in testing.  The DLZ interface itself is going to be scheduled
for removal.

The DLZ modules now live in https://gitlab.isc.org/isc-projects/dlz-modules
repository.

Closes #4865

Merge branch '4865-remove-contributed-DLZ-modules' into 'main'

See merge request isc-projects/bind9!9349

.gitlab-ci.yml

@@ -316,9 +316,7 @@ stages:
     - *configure
     - *check_readline_setup
     - make -j${BUILD_PARALLEL_JOBS:-1} -k all V=1
-    - test -z "${BUILD_CONTRIB}" || for DIR in contrib/dlz/modules/*; do test -f "${DIR}/Makefile" && CFLAGS="${CFLAGS} -Werror" make -C "${DIR}"; done
     - test -z "${RUN_MAKE_INSTALL}" || make DESTDIR="${INSTALL_PATH}" install
-    - test -z "${RUN_MAKE_INSTALL}" -o -z "${BUILD_CONTRIB}" || for DIR in contrib/dlz/modules/*; do test -f "${DIR}/Makefile" && make -C "${DIR}" DESTDIR="${INSTALL_PATH}" install; done
     - test -z "${RUN_MAKE_INSTALL}" || DESTDIR="${INSTALL_PATH}" sh util/check-make-install
     - if [[ "${CFLAGS}" == *"-fsanitize=address"* ]]; then ( ! grep -F AddressSanitizer config.log ); fi
     - test -z "${CROSS_COMPILATION}" || grep -F -A 1 "checking whether we are cross compiling" config.log | grep -q "result.*yes"
@@ -886,7 +884,6 @@ gcc:tarball:nosphinx:
 
 gcc:bookworm:amd64:
   variables:
-    BUILD_CONTRIB: 1
     CC: gcc
     CFLAGS: "${CFLAGS_COMMON} --coverage -O0"
     EXTRA_CONFIGURE: "--with-libidn2 ${WITH_READLINE_LIBEDIT}"
@@ -1343,7 +1340,6 @@ tsan:stress:
 
 clang:bookworm:amd64:
   variables:
-    BUILD_CONTRIB: 1
     CC: ${CLANG}
     CFLAGS: "${CFLAGS_COMMON} -Wenum-conversion -DOPENSSL_API_COMPAT=10100"
     # See https://gitlab.isc.org/isc-projects/bind9/-/issues/3444

contrib/README

@@ -23,9 +23,8 @@ be fixed as time permits.
 
     - dlz/modules
 
-      Dynamically linkable DLZ modules that can be configured into
-      named at runtime, enabling access to external data sources including
-      LDAP, MySQL, Berkeley DB, perl scripts, etc.
+      Dynamically linkable DLZ modules have been moved into a separate
+      repository located at https://gitlab.isc.org/isc-projects/dlz-modules.
 
     - gitchangelog/