Add support of databases from more than one MySQL installation.

hosts/scripts/main_part.include

@@ -266,9 +266,24 @@ if [ "$found" = "true" -o "$pgsql_backup" = "true"  -o "$mysql_backup" = "true"
       $script_dir/svn_backup.sh
    fi
    if $mysql_backup ;then
-      echolog "\nGoing to backup mysql databases..  ( `$date +%H`:`$date +%M` h )"
-      export mysql_user mysql_password mysql_credential_args mysql_gzip
-      $script_dir/mysql_backup.sh
+
+      if [[ ${#mysql_credential_args_arr[@]} -gt 0 ]] ; then
+         for _val in "${mysql_credential_args_arr[@]}" ; do
+
+            IFS=':' read -a _val_arr <<< "${_val}"
+
+            mysql_version="${_val_arr[0]}"
+            mysql_credential_args="${_val_arr[1]}"
+
+            echolog "\nGoing to backup mysql databases ${_val_arr[0]} ..  ( `$date +%H`:`$date +%M` h )"
+            export mysql_version mysql_credential_args mysql_gzip
+            $script_dir/mysql_backup.sh
+         done
+      else
+         echolog "\nGoing to backup mysql databases..  ( `$date +%H`:`$date +%M` h )"
+         export mysql_user mysql_password mysql_credential_args mysql_gzip
+         $script_dir/mysql_backup.sh 
+      fi
       ## - !! 
       if $restart_apache ;then
          $ssh ${ssh_user}@$srcHost "sudo /etc/init.d/apache2 restart"