wdisp/ssl_auth is a SAP Parameter attribute which is used to control Determines which X.509 certificate to present to the backend system information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter determines which X.509 client certificate of the SAP Web
Dispatcher can be used with the application servers.
Following values are possible:
0: No certificate
1: Default certificate
2: Use the certificate specified in the parameter
See SAP Parameter Documentation for full SAP documentation for this profile parameter.