TTD stores invalid orders different than OTTD, this resulted in empty lines in the order list. With the overhaul of the order system this got worse: no line was shown at all.
Fix this by sanity checking while loading and convert the orders accordingly.
This adds no functionality, but is a stepping stone for future improvement (like 16bit order indices) and is easier to read.
This changes preserves binary compatibility wrt savegames.
-Fix: desync problem fixes
-Fix: server doesnt hang anymore when a client timed out
-Feature: low latency connection enhancements [*net_sync_freq, *net_ready_ahead]
except for German Townnames (also fix one typo on
English town-names)
-CodeChange: *act_paper to *act_water in Town to
more resemble its use
-Fix: AI players now retain AI status. Since TTDLX
savegame status is not fully documented, some holes
exist (AI state is set to one without a vehicle, otherwise
it crashes)
