Took care of some more lintian warnings

.gitlab-ci.yml

@@ -66,7 +66,7 @@ build_debian:
       cat CHANGELOG.md | grep -A 1000 "<"'!'"-- BEGIN CHANGES ${version} -->" | grep -B 1000 "<"'!'"-- END CHANGES ${version} -->" | tail -n +2 | head -n -1 | sed -re 's/^-/  */g' >> package/debian/matemat/usr/share/doc/matemat/changelog
       echo "\n -- ${PACKAGE_AUTHOR}  $(date -R)\n" >> package/debian/matemat/usr/share/doc/matemat/changelog
     done
-  - gzip -9 package/debian/matemat/usr/share/doc/matemat/changelog
+  - gzip -9n package/debian/matemat/usr/share/doc/matemat/changelog
   - cp -r static/ package/debian/matemat/usr/lib/matemat/static/
   - cp -r templates/ package/debian/matemat/usr/lib/matemat/templates/
   - python3.6 setup.py egg_info install --root=package/debian/matemat/ --prefix=/usr --optimize=1

package/debian/matemat/DEBIAN/postinst

@@ -12,9 +12,8 @@ if [[ "$1" == "configure" ]]; then
         useradd --system --create-home --gid matemat --home-dir /var/lib/matemat --shell /usr/sbin/nologin matemat
     fi
 
-    chown matemat:matemat -R /var/lib/matemat
-    find /var/lib/matemat -type d -exec chmod 0750 {} \;
-    find /var/lib/matemat -type f -exec chmod 0640 {} \;
+    chown matemat:matemat /var/lib/matemat
+    chmod 0750 /var/lib/matemat
     ln -sf /var/lib/matemat/upload /usr/lib/matemat/static/upload
 
     systemctl daemon-reload

package/debian/matemat/DEBIAN/prerm

@@ -4,7 +4,6 @@ set -e
 
 if [[ "$1" == "remove" ]]; then
 
-    systemctl stop matemat.service
     userdel matemat
 
 fi