Merge 'sybase_mssql' into 'trunk'

r6037@mullet (orig r6036):  arcanez | 2009-04-30 01:24:41 -0700
branch to work on Sybase/MSSQL subtleties
r6038@mullet (orig r6037):  arcanez | 2009-04-30 01:27:11 -0700
jump to ::DBI::Sybase::MSSQL if we are using MSSQL through Sybase
r6062@mullet (orig r6061):  arcanez | 2009-04-30 14:05:24 -0700
fixes for MSSQL via Sybase
r6126@mullet (orig r6125):  arcanez | 2009-05-05 00:27:13 -0700
add a line to Changes and add a CAVEAT