[Freeciv-Dev] (PR#9643) wordwrap_string is insecure

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=9643 >

wordwrap_string takes a string and makes it longer.  This is insecure 
since it doesn't check the buffer length.  For instance in helpdata.c we 
just allocate a 64k buffer and assume it will never overflow.  A 
malicious person could easily make it overflow.

The solution, of course, is just to pass the bufsz to wordwrap_string.

jason