Add Readme for installing old (not mysqli or mysql_pdo) mysql drivers.

DOC/README.php7_old_mysql

@@ -0,0 +1,38 @@
+## - How to put lagacy MySQL functions back into PHP 7
+## - 
+## - see: https://ckon.wordpress.com/2015/08/06/put-mysql-functions-back-into-php-7/
+## -
+## - So you can use legacy code that uses the mysql_* functions. 
+
+
+# - Note:
+# -
+# - MySQL native driver must be enabled at php 7.1 installation. This will 
+# - be done implicitly,  when required by other extensions 
+# -    --with-mysqli=mysqlnd
+# - or
+# -    --with-pdo-mysql=mysqlnd 
+# -
+# - Otherwise you have to enabled it with option:
+# -    --enable-mysqlnd
+# - 
+
+# - Install
+# -
+mkdir /usr/local/src/php_mysql
+
+cd /usr/local/src/php_mysql
+
+git clone https://github.com/php/pecl-database-mysql     mysql   --recursive
+
+cd mysql
+phpize
+./configure
+make
+make install
+
+
+# - Then edit your php.ini
+# - Somewhere either in the “Extensions” section or “MySQL” section, simply add this line:
+# -
+# -    extension = /usr/local/lib/php/extensions/no-debug-non-zts-20151012/mysql.so