Thread:Support/About MediaWiki:Apihelp-zeroconfig-param-type/en

In Analogy to Thread:Support/About MediaWiki:Apihelp-sitematrix-param-state/ksh config message are likely not to be translated, which would have to be documented.

Also various clarifications are needed:
 * What is an or the the X-CS header?
 * How to translate "agent param"?
 * What is "language-appropriate verbiage"?