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Darkvater

(svn r7205) -Fix [FS#350, SF#1560913]: Window allocation and deletion messed with the actual window
structs inside their array, and possibly invalidating pointers higher up.
Meaning that any function called within an wndproc could cause unknown/invalid pointers
once control was returned to this function. Solved by the introduction of an extra
abstraction layer, an array of z-window positions that is only concerned with the
pointers.

Scripting
---------

OpenTTD supports scripts.

local scripts:
 - 'autoexec.scr' is executed on gamestart [all - use this for custom aliases per ex.]

+network scripts:
   should be used to set client optimization settings:
 - 'on_client.scr' is executed when you join a server [all clients]

   should be used to set the servers port/ip and/or server optimization settings/patches:
 - 'pre_server.scr' is executed before the servers tcp stack is started [in-game only]
 - 'pre_dedicated.scr' is executed before the servers tcp stack is started [dedicated only]

   should be used to set the servers name, password and so on:
 - 'on_server.scr' is executed after starting a server [dedicated and in-game]
 - 'on_dedicated.scr' is additionally executed after starting a server [dedicated only]

For examples how a script can look, check the .example examples.