ghostmansd found that extswsli is incorrectly declared

ghostmansd found that extswsli is incorrectly declared
as extswsli RA,RS,SH as XS-Form, where a quick check shows that
there *is* no field "SH" in XS-Form. there *is* however a field "sh"
in XS-Form and the pseudocode *correctly* uses it.

that then led to a review of all the other uses of SH and sh,
which also led to spotting that ME and MB are *also* mis-used
(MD-Form and MDS-Form) and need lower-casing in the operand
declaration but are *also* correct in the pseudo-code
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