- parallelize the build in openldap.yml and don't clone the full history.

- removing master from the testing matrix of openldap (not a target
  version)

Author: gasbytes

.github/workflows/openldap.yml

@@ -16,9 +16,6 @@ jobs:
     strategy:
       matrix:
         include:
-          - os: ubuntu-latest
-            openldap_ref: 'master'
-            use_container: true
           - os: ubuntu-latest
             openldap_ref: 'OPENLDAP_REL_ENG_2_5_13'
             use_container: true
@@ -143,11 +140,8 @@ jobs:
 
       - name: Build OpenLDAP at ${{ matrix.openldap_ref }}
         run: |
-          git clone https://git.openldap.org/openldap/openldap.git
-          cd openldap
-          if [ "${{ matrix.openldap_ref }}" != "master" ]; then
-            git checkout ${{ matrix.openldap_ref }}
-          fi
+          git clone --depth 1 --branch "${{ matrix.openldap_ref }}" \
+            https://git.openldap.org/openldap/openldap.git
       - name: Configure OpenLDAP
         working-directory: openldap
         run: |
@@ -196,7 +190,7 @@ jobs:
         working-directory: openldap
         run: |
           make depend
-          make
+          make -j$(nproc)
       - name: Test OpenLDAP
         working-directory: openldap
         run: |