[Firebird-docs] GSPLIT chanpter added to the command line utilities manual

[Norman D. <No...@Bo...>]

Just in time for Christmas (insert appropriate religious festival here), 
I have added a new chapter to the command line utilities book. This one 
describes the Windows only GSPLIT utility (which doesn't seem to work !).

I've also corrected a few spelling mistakes and added 
'changeGDSCompatibleLibraryLink' to the chapter on Unix scripts.

Enjoy.

As ever, comments, updates, corrections welcome.


Regards,
Norm.