(svn r1407) -Codechange: changed a lot around _stations, _vehicles, _towns and _industries
(in prepare of dynamic arrays):
- DEREF_XXX is changed into GetXXX
- All direct call are directed via GetXXX
- struct Industry has now an index-field
- ENUM'd some stuff
- Replaced home built loops with FOR_ALL_XXX
- Added _stations_size, _vehicles_size, ... which gives the length of the
array (which will be dynamic in the near future)
- Changed lengtof(XXX) to _XXX_size (e.g. _stations_size)
- Removed all endof(XXX) (because mostly it was part of a FOR_ALL_XXX)
- Made the sort-functions of all 4 dynamic
- Made all 4 Initialize functions more of the same
- Some minor tab-fixing and stuff
(tnx to Tron for proof-reading my 100kb patch ;))

Note for all: please do NOT directly call _stations, _vehicles, _towns and
_industries, but use the right wrapper to access them. Thank you.
Ps: please also do not use 'v++', where v is of type Vehicle *.

#ifndef NETWORK_LAN_H
#define NETWORK_LAN_H

#ifdef ENABLE_NETWORK

void NetworkUDPInitialize(void);
bool NetworkUDPListen(SOCKET *udp, uint32 host, uint16 port, bool broadcast);
void NetworkUDPReceive(SOCKET udp);
void NetworkUDPSearchGame(void);
void NetworkUDPQueryMasterServer(void);
NetworkGameList *NetworkUDPQueryServer(const byte* host, unsigned short port);
void NetworkUDPAdvertise(void);
void NetworkUDPRemoveAdvertise(void);

#endif

#endif /* NETWORK_LAN_H */