Log Message:
openttd: updated to 1.9.1

1.9.1:
- Fix 6564: Enforce types of arguments for station name strings
- Fix 7433: Don't use AirportSpec substitute if it's not enabled
- Fix 7447, 7466, 7476: Missing NewGRF strings due to Action 4 feature check \ 
skipping pseudo-feature 48
- Fix 6222: Advanced sprite layout sometimes showed incorrect railtype ground tile.
- Fix 7439: CompanyRemoveReason overwritten by ClientID
- Fix: [Windows] Incorrect error handling could lead to cascading error windows
- Fix 7478: Don't remove NewGRF objects on company take-over.

1.9.0:
- Fix 7411: Use industry production callback (if used) on initial industry cargo \ 
generation

1.9.0-RC2:
- Fix 7400: WaterClass for tree tiles was not converted for old saves preventing \ 
industry creation
- Fix: Filtered file list did not scroll properly
- Fix 7391: Don't invalidate go to depot orders of non-aircraft when \ 
invalidating hangar orders that happen to share IDs
- Fix 7386: Measurement tooltip for tunnels, aqueducts & docks did not \ 
display or flickered
- Fix: Wrong company performance rating when money exceeds INT_MAX
- Fix: Permit loading of industry production callback with invalid cargo type
- Fix: Spelling for a few real town names
- Fix: Runway too short for large aircraft message should not depend on plane \ 
crashes setting
- Fix 7334: Ship lost after crossing bridge due to path cache not being consumed \ 
while on final bridge end

1.9.0-RC1:
- Add: Various AI/GS functions for vehicle groups
- Change: Synchronise introduction date and reliability randomness across \ 
vehicles with the same base introduction date
- Change: Allow towns to build bridges over rails and one-way roads
- Fix: Detection of coast tiles with trees on them
- Fix: Emergency netsave saved the title game instead of the broken game in question
- Fix: Company livery window showed incorrect groups when opened in multiplayer
- Fix: Unable to select last group in open livery window
- Fix: Goto hangar orders were not invalidated when rebuilding airports

1.9.0-beta3:
- Feature: Option to adjust font size separately from GUI size
- Feature: Increase maximum number of orders from 64000 to ~16.7m
- Add: Show performance of AI and GS in framerate window
- Add: News menu entry and shortcut for deleting all messages
- Change: [OSX] Improved scrolling behaviour when using touchpads
- Change: Add scrollbar to cargo legend in cargo payment rates window
- Change: Owner of vehicle with exclusive transport rights may now load cargo \ 
from neutral stations
- Change: Improved UI behaviour when dragging sound volume sliders with the mouse
- Change: Use selected vehicle group as parent when creating a new group
- Change: Use SlErrorCorrupt() on pool index error when loading a savegame, \ 
instead of terminating
- Change: Skip reliability decay if servicing is disabled
- Fix: Remove desert around lakes upon generation
- Fix: Re-sorting file list did not update filtered rows
- Fix 7159: Waiting time at red one-way signals was too short
- Fix 7189: Fluidsynth volume gain too high
- Fix 7004: Cargo flow legend was not properly refreshed after zooming
- Fix: Possibility to modify wrong AI/GS settings when switching AI/GS scripts around
- Fix: Use more descriptive "spectator" strings for story book and \ 
goal dropdown menus
- Fix 6599: Disable build and rename button in build vehicle window when no \ 
vehicle is selected
- Fix: Do not mangle tagged revision strings for network revision strings
- Fix 7151: AI start date deviation was still applied when not set to a random AI
- Fix 7197: Invalidate depot buttons when necessary
- Doc: [AI] UnshareOrders empties the orders list of the vehicle

1.9.0-beta2:
- Fix: Non-Windows builds did not get correct git hash

1.9.0-beta1:
Note: OpenTTD was migrated to GitHub for 1.9, so SVN revision and FlySpray \ 
numbers have been replaced with Pull Requests and Issue numbers
- Feature: Group liveries, and livery window usability enhancements
- Feature: Overhaul of music system, support MPSMIDI music files (TTD DOS/TTO)
- Feature: [Win32] Rewritten DMusic and WinMM music drivers
- Feature: [Win32] New XAudio2 sound driver
- Feature: [Linux] New Fluidsynth music driver
- Feature: Framerate display window
- Feature: [NewGRF] Ability for industries & houses to produce and/or accept \ 
up to 16 different cargoes
- Feature 6610: Allow towns to build houses on road turns
- Feature: Replace independent map scrolling GUI settings with single option, \ 
and add choice to not lock cursor position when scrolling
- Feature 6459: API for querying network clients from GS
- Feature: New Russian Ruble & Mexican Peso as currencies
- Feature 4186: Append '(City)' after city names in the town directory
- Feature 986: Automatic save when losing connection to a network game
- Add: [NewGRF] Flag to hide rail types from construction
- Add: [NewGRF] Airport animation trigger for plane landing
- Add 4115: Default starting company colour setting
- Add: Mixer feature for streaming sampled music
- Add 6460: [AI] start_date parameter for Random AIs on new game
- Add: BACKSPACE can be mapped as a hotkey
- Add: 32bpp SSE2 blitter palette animator
- Change: Make ships turn slowly when changing direction and stop when going up \ 
or down a lock
- Change: Improve ship pathfinder performance
- Change: Decouple GUI timing from game ticks
- Change: Desert tiles are now half-desert if a neighboured tile is non-desert \ 
or sea/coast
- Change: Gradually slow down aircraft speed on breakdown
- Change: [NewGRF] Increase rail type & cargo type limits to 64
- Change: [NewGRF] Increase size of persistent storage to 256
- Change: [NewGRF] Use last OpenTTD SVN revision in NewGRF version number
- Change: Clone tool in depot window now behaves like clone button in vehicle window
- Change 6397: Keep town growth rate in sync with house count
- Change: Scale default FreeType font size selection by UI zoom level
- Change: [OSX] Reversed pinch to zoom behaviour
- Change: Switch town growth rate and counter to actual game ticks
- Change: Non-tag revisions are now named \ 
'<commitdate>-<branch>-g<shorthash><modified>'
- Change: Rewrite several bits of documentation in markdown
- Fix: Reinitialise graph GUI on game restart
- Fix: Potential crash during shutdown after unpacking downloaded content
- Fix 6584: Text layout in engine preview dialogue
- Fix 6636: Airplanes could be sent to helicopter station depots
- Fix: Deadlock when launched with -n switch
- Fix: Various corrections to town names in non-English languages
- Fix: Only consider airport tiles when placing (for non-rectangular airports)
- Fix: Spelling fixes on some Latin American town names
- Fix 7001: Pathfinders should see standard road stations as tiles where to reverse
- Fix 6676: Prevent helicopters from stopping in midair during some kinds of landing
- Fix: Remove need to use Ctrl+Click when building stations next to competitors
- Fix: [NewGRF] Make VA2 operator 11 (ror) behave well-defined when rotating by \ 
0 bits
- Fix 4109: Add more water checks to the Oil Rig layout
- Fix 6938: Incorrect value for "Cost to Clear" was displayed for \ 
Company Headquarters in tile inspector
- Fix 6920: Make 9.8m/s^2 a common constant for TE-calculation
- Fix 6892: [Script] CONFIG_RANDOM did not use the full parameter range
- Fix 6622: News message when GS constructs a town had empty company name
- Fix: [NewGRF] Action7 variable 0x85 had no bounds checks
- Fix 6875: Depot building cost did not include foundation build cost
- Fix: Some pixels in ship autoreplace icon (sprite 106) were transparent
- Fix: Poor contrast in cargo dest flow legend window cargo labels
- Fix 6553: Make viewport button text unambiguous
- Fix: [OSX] Setting mouse-wheel to scroll the map does not disable pinch to zoom
- Fix 6969: Account for BOM when reading script files
- Fix 6898: Ability to use seeds above INT_MAX
- Fix 6659: Bus stations could be demolished when not in demolish mode
- Fix: One-way roads could be over-built by road stops regardless of road owner
- Fix: Use name of cargo instead of Passengers/Mail in town statistics
- Fix: Prevent ships moving into docks after finishing (un)loading
- Fix: Tractive effort was slightly too high as per NewGRF spec
- Fix 6465: Add {NORMAL_FONT} and {MONO_FONT} control codes to GS strings
- Fix: Four group action icons were misplaced and cropped
- Remove: PSP, WinCE support