wdisp/HTTP/esid_support is a SAP Parameter attribute which is used to control Support stickiness of HTTP external session id for AS ABAP 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 .
The parameter determines whether the session dispatching is used with
the session ID table.
If the value is set to FALSE, the ESIDs are ignored and the old
procedure used.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.