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Already on GitHub? Sign in to your account Http header names should be validated

Steps to Reproduce
Send an http request that contains a header where the header name contains an invalid character.

Expected behavior
The http response to an http request that contains an invalid character should contain a response code of 400.

Diagnostic information:

OpenLiberty Version: [e.g. first release - 23.0.0.1]
Affected feature(s): servlet-4.0, servlet-3.1, servlet-3.0
Java Version: n/a
server.xml configuration