[Tcl-tdbc] ANNOUNCE: tdbc::odbc support for 32-bit SQLWCHAR

[Kevin K. <kev...@gm...>]

Today, I merged onto the tdbc::odbc trunk Christian Werner's changes for
support of ODBC systems (specifically, iodbc) that use a 32-bit SQLWCHAR.
By dint of sufficiently clever programming, the tdbc::odbc driver is able
to detect at run time whether SQLWCHAR is 16 or 32 bits, and adapt its
operation accordingly, so binary distributors need not worry about matching
tdbc::odbc to the particular ODBC in use. Many other ODBC-using systems on
Unix need to have separate versions for unixodbc and iodbc, but Tcl escapes
that.

Because this is a significant added capability (enabling the support of
MacOSX and BSD-derived systems), I advanced the minor version from 1.0 to
1.1.

Many thanks to Christian for managing to develop the solution, and to Ashok
Nadkarni for being our tester for all things Windows!