Add ability to specify server address for ADO connect string.

Fixes #321: Add ability to specify server address for ADO connect string.
Allow to restore mssqlvdi database dumps to a file on the filesystem.
Fix overflow in visual bitmap.

Should allocate FO_MAX + 1 bytes (one for every 0 or 1 in the bitmap)
and not FOPTS_BYTES which is one bit per option.