(svn r9376) -Fix (r8969): off-by-one error for the amount of mouth pieces for men.

(svn r9373) -Fix (r9271): the chosen language was not stored nor read properly in/from the cfg.

(svn r9371) -Feature: Add support for variable snow lines in the arctic climate, supplied
by newgrf files. When this is enabled forests cannot be built below the highest
snow line, and farms can't be built above it. Houses still use the
_opt.snow_line so they are all consistent, so to make them respect the snowline
you may want to use some newhouses features as well.

(svn r9367) -Fix (r9315): If a new house doesn't have a corresponding action 3, the
graphics for the substitute (original) house should be drawn instead.

(svn r9366) -Codechange: Unify the different houses acceptances attributes on their cargo counterpart, as well as specifying cargo slot.

(svn r9352) -Codechange: Use cargo class to determine if an aircraft should carry mail

(svn r9340) [Config] -Fix: on some systems $_ was set to /usr/bin/make; filter for this (tnx peter1138)

(svn r9339) -Codechange: disable shares by default as the sharing system is broken (abusable) and should therefor not be used in multiplayer games.
-Codechange: make default maximum distance from the edge for oil refineries a little higher, so the chance that you get oil refineries is a little better.

(svn r9338) -Fix: close the Shared Order Vehicle List if you remove the shared link with only 2 vehicles

(svn r9337) -Fix [FS#542]: assert() when you removed the orders of a shared list while having the shared order vehicle list open.