Forcibly increase the freight coverage radius to fix broken save files.
Fix logic bug in factory "nearby halt" updates when deleting a tile; fix shadowed variable names which made the bug less-than-obvious
Set wait_lock in convoi_t::hat_gehalten (fix accidentially deleted code).  Should help with performance.
Merge branch '11x-fixes' into merge-from-standard
Fix bug which caused revenue to be realized when unloading zero passengers/freight.  Also, clean up hat_behalten code to be much more readable.
Fix error from last commit.
Don't include float32e8 where it's not needed.
Fix mindless typo in last commit of finance.cc