Move calls to fabrik_t::recalc_nearby_halts and mark_connected_roads out of constructor, into fabrikbauer_t.  This avoids certain initialization order problems.
Merge remote-tracking branch 'jamespetts/11.x' into 11x-fixes
Fix errors introduced by James while merging my code.
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.
CHANGE: Make the forcing of station coverage for factories to be at least 3 limited to saved games with the current, not next version.