(svn r2290) - CodeChange: protect the next batch of commands. This brings us to a total of 61, which is 53% :)
- CodeChange: To correctly accept engine-prototypes, the best-player checking has been moved to its own function, I hope it functions the same as before.
- CodeChange: Added symbolic types of PlayerID, OrderID and EngineID. For engines also added GetEngine() and IsEngineIndex(), similar to the other such functions.
- CodeChange: To correctly build industries, some tables have been moved to build_industry.h. The only way to find out currently if an industry is valid in a climate is by looping all industries and checking if it matches. Also to comply with the patch setting build_rawmaterial_industries, it is assumed that these industries do not accept any cargo of any type. This can and probably should changed in the future to some flag in their struct. Also use _opt_ptr instead of _opt.
- CodeChange: implemented the HQ checking code inspired by MarkR2 in "[ 1190944 ] Many commands not checked for security". Unfortunately it is impossible to prevent only deleting a HQ by a modified client atm.
- CodeChange: For insert order and modify order their parameters are implicitely truncated to 8 bits, instead of the 16 bits said in the comments.

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#ifndef DEBUG_H

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#define DEBUG_H

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#ifdef NO_DEBUG_MESSAGES

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	#define DEBUG(name, level)

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#else

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	#define DEBUG(name, level) if (level == 0 || _debug_ ## name ## _level >= level) debug

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	extern int _debug_ai_level;

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	extern int _debug_grf_level;

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	extern int _debug_map_level;

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	extern int _debug_misc_level;

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	extern int _debug_ms_level;

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	extern int _debug_net_level;

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	extern int _debug_spritecache_level;

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	extern int _debug_oldloader_level;

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	extern int _debug_npf_level;

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#endif

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void CDECL debug(const char *s, ...);

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void SetDebugString(const char *s);

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#endif