Build: Add support to MariaDB 10.4 on Windows

MariaDB 10.4 (latest stable) is the only supported version.

cmake/macros/FindMySQL.cmake

@@ -103,6 +103,8 @@ find_path(MYSQL_INCLUDE_DIR
     "$ENV{SystemDrive}/MySQL/MySQL Server 5.7/include"
     "c:/msys/local/include"
     "$ENV{MYSQL_ROOT}/include"
+    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4;INSTALLDIR]/include/mysql"
+    "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4 (x64);INSTALLDIR]/include/mysql"
   DOC
     "Specify the directory containing mysql.h."
 )
@@ -127,7 +129,7 @@ endif( UNIX )
 if( WIN32 )
   find_library( MYSQL_LIBRARY
     NAMES
-      libmysql
+      libmysql libmariadb
     PATHS
       ${MYSQL_ADD_LIBRARIES_PATH}
       "${PROGRAM_FILES_64}/MySQL/MySQL Server 8.0/lib"
@@ -158,6 +160,8 @@ if( WIN32 )
       "$ENV{SystemDrive}/MySQL/MySQL Server 5.7/lib/opt"
       "c:/msys/local/include"
       "$ENV{MYSQL_ROOT}/lib"
+      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4;INSTALLDIR]/lib"
+      "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4 (x64);INSTALLDIR]/lib"
     DOC "Specify the location of the mysql library here."
   )
 endif( WIN32 )
@@ -219,6 +223,8 @@ if( WIN32 )
         "$ENV{SystemDrive}/MySQL/MySQL Server 5.7/bin/opt"
         "c:/msys/local/include"
         "$ENV{MYSQL_ROOT}/bin"
+        "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4;INSTALLDIR]/bin"
+        "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MariaDB 10.4 (x64);INSTALLDIR]/bin"
      DOC
         "path to your mysql binary."
     )