Revised the procedures about installing and updating the Informix encryption certificate for clarity.

Corrected various commands. For example, references to cms_ol.kdb have been changed to cms_ol.p12 because the .kdb format is no longer supported.

Minor rephrasing and formatting fixes in various sections.

Revised Informix information and cleaned up outdated IBM references.

Updated ODBC and JDBC software with various edits and indicated that you can download client libraries for HCL Informix from https://www.actian.com.

Updated the information about obtaining JDBC and Client SDK files in Installing JDBC on a Windows client.