Set sensible default for mysql client

Using $HOME/.my.cnf to make easier for user to connect to mysql client.

stack.sh

@@ -318,6 +318,16 @@ mysql-server-5.1 mysql-server/root_password_again password $MYSQL_PASS
 mysql-server-5.1 mysql-server/start_on_boot boolean true
 MYSQL_PRESEED
 
+    if [[ ! -e $HOME/.my.cnf ]]; then
+        cat <<EOF >$HOME/.my.cnf
+[client]
+user=$MYSQL_USER
+password=$MYSQL_PASS    
+host=$MYSQL_HOST
+EOF
+        chmod 0600 $HOME/.my.cnf
+    fi
+
     # Install and start mysql-server
     sudo apt-get -y -q install mysql-server
     # Update the DB to give user ‘$MYSQL_USER’@’%’ full control of the all databases: