xp_cmdshell being called when it might not be enabled

[gambit9009]

xp_cmdshell is called in multiple places. Linux can't have this and is already Issue #35. But we should check all the places we call this to make sure xp_cmdshell is enabled and also make sure we really need to be calling xp_cmdshell to get the info.

Called multiple places in MSDagProcs.sql and FTS_Collector.sql

...see this code, line 2646 to be sure we do it everywhere.
-- Ensure xp_cmdshell is enabled before we try this
if (select value from sys.sysconfigures WHERE config=16390)=1 BEGIN