Try adding mysql to github workflow in ubuntu 20.04

Remove my_bool, has been removed in MySQL 8.0

.github/workflows/build.yaml

@@ -25,7 +25,7 @@ jobs:
             CXXFLAGS: -Werror
         - os: ubuntu-20.04
           cmake-path: /usr/bin/
-          cmake-args: -G Ninja
+          cmake-args: -G Ninja -DTEST_MYSQL=ON
           package-file: "*-linux_x86_64.tar.xz"
           fancy: false
           env:
@@ -60,15 +60,31 @@ jobs:
         sudo apt-get upgrade -y
         sudo apt-get install pkg-config cmake ninja-build libfreetype6-dev libnotify-dev libsdl2-dev libsqlite3-dev libvulkan-dev glslang-tools spirv-tools libavcodec-dev libavformat-dev libavutil-dev libswresample-dev libswscale-dev libx264-dev -y
 
+    - name: Prepare Linux (non-fancy)
+      if: ${{ contains(matrix.os, 'ubuntu') && !matrix.fancy }}
+      run: |
+        sudo rm -rf /var/lib/mysql/ /var/run/mysqld
+        sudo mkdir /var/lib/mysql/ /var/run/mysqld/
+        sudo chown mysql:mysql /var/lib/mysql/ /var/run/mysqld/
+        sudo mysqld --initialize-insecure --user=mysql --basedir=/usr --datadir=/var/lib/mysql/
+        sudo /usr/bin/mysqld_safe --basedir=/usr --datadir='/var/lib/mysql/' &
+        sleep 10
+        sudo mysql <<EOF
+        CREATE DATABASE ddnet;
+        CREATE USER 'ddnet'@'localhost' IDENTIFIED BY 'thebestpassword';
+        GRANT ALL PRIVILEGES ON ddnet.* TO 'ddnet'@'localhost';
+        FLUSH PRIVILEGES;
+        EOF
+
     - name: Prepare Linux (fancy)
       if: contains(matrix.os, 'ubuntu') && matrix.fancy
       run: |
         sudo apt-get install libmariadbclient-dev libwebsockets-dev mariadb-server-10.3 -y
         sudo rm -rf /var/lib/mysql/
         sudo mysql_install_db --user=mysql --datadir=/var/lib/mysql/
-        cd /usr; sudo /usr/bin/mysqld_safe --datadir='/var/lib/mysql/' --no-watch
+        cd /usr; sudo mysqld_safe --datadir='/var/lib/mysql/' --no-watch
         sleep 10
-        sudo mariadb <<EOF
+        sudo mysql <<EOF
         CREATE DATABASE ddnet;
         CREATE USER 'ddnet'@'localhost' IDENTIFIED BY 'thebestpassword';
         GRANT ALL PRIVILEGES ON ddnet.* TO 'ddnet'@'localhost';
@@ -141,7 +157,7 @@ jobs:
       run: |
         mkdir fancy
         cd fancy
-        ${{ matrix.cmake-path }}cmake ${{ matrix.cmake-args }} -DCMAKE_BUILD_TYPE=RelWithDebInfo -DDOWNLOAD_GTEST=ON -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE=. -DANTIBOT=ON -DTEST_MYSQL=ON -DWEBSOCKETS=ON ..
+        ${{ matrix.cmake-path }}cmake ${{ matrix.cmake-args }} -DCMAKE_BUILD_TYPE=RelWithDebInfo -DDOWNLOAD_GTEST=ON -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE=. -DANTIBOT=ON -DWEBSOCKETS=ON ..
         ${{ matrix.cmake-path }}cmake --build . --config RelWithDebInfo --target everything ${{ matrix.build-args }}
     - name: Test fancy
       if: matrix.fancy

src/engine/server/databases/mysql.cpp

@@ -10,6 +10,10 @@
 #include <memory>
 #include <vector>
 
+#ifndef LIBMARIADB
+typedef bool my_bool;
+#endif
+
 enum
 {
 	MYSQLSTATE_UNINITIALIZED,