Add Progress support to the existing default Linux UnixODBC library (instead of the UnixODBC library shipped with the Progress ODBC driver).

For PHP to work under Red Hat/CentOS Linux for example there is 2 ways to use the Progress ODBC driver:

using a workaround:
http://knowledgebase.progress.com/articles/Article/000027930

and the fully Progress supported way:
http://knowledgebase.progress.com/articles/Article/000035694

The fully Progress supported way to use the Progress Linux ODBC driver with PHP involve customizing and compiling the PHP code source to use the Progress supplied UnixODBC library, this make updating PHP more difficult since the PHP source code need to be recompiled for each (security) update.

The workaround described in the article 000027930 allow to use the default Linux UnixODBC libraries and allow updating PHP by using the Linux operating system prebuilt packages however this type of ODBC configuration is not fully supported by Progress.