2014.11.07 MSS Code Factory 1.11.12550 Attempted fix for DB/2 LUW sp_delete

I've borrowed the style of code from sp_moveup and sp_movedown for identifying
the chain links in sp_delete, along with a reworking of the variable names.
Due to some apparent file corruption, I'm not confident that the 12548 release
is valid; this is mostly an untested repackaging.  As with the previous one,
don't download it unless you're a serious glutton for punishment and untested
code.