Having laid all the groundwork, we can now remove the global `cfg'

completely from putty.h. It's now static in each of the command-line
front ends, shared only between window.c and windlg.c in PuTTY
proper (I've tested this by doing #define cfg cfgsillyname in those
two files only, and it still links so nobody else is using that
symbol!), and part of the `inst' structure in pterm. I think that
only leaves the Unicode module as the last stubborn holdout in the
anti-global-variables campaign.

[originally from svn r2568]

unix/uxplink.c

@@ -72,6 +72,7 @@ struct termios orig_termios;
 
 static Backend *back;
 static void *backhandle;
+static Config cfg;
 
 /*
  * Default settings that are specific to pterm.