Add new database support to icingaweb2 (icingaweb2-vendor-zf1)

Dear community,

Because like I wrote in the thread Data Import from IBM DB2 the DB access to DB2 doesn’t work (with the used zend Framework and PHP-FPM) for us, I would try to add the possability to access a ODBC source to icingaweb2.

I looked at the merge request for adding DB2 support to icingaweb2 at github and I did the same like there in our test environment. That was not the problem.
But now I saw that under /usr/share/icingaweb2/library/vendor/Zend/Db/Adapter that there is missing a file for ODBC support for the Zend framework. So how I can add this and where I could get such needed files which also supports the used framework? In the original source Code from version 1.12.20 it’s also not included. Any hint would be appreciated.