(svn r8446) -Fix (8445): accidentally made a function that should not be abstract abstract.

(svn r8445) -Cleanup: remove some @params from comments as the parameters did not exist anymore and add comments to several variables/functions.

(svn r8444) -Fix: [Translations] Fixes from russian translator Quark

(svn r8443) -Update: WebTranslator2 update to 2007-01-28 19:36:45
czech - 4 fixed by Hadez (4)
danish - 1 changed by MiR (1)
korean - 3 changed by darkttd (3)
turkish - 4 fixed by jnmbk (4)

(svn r8437) -Codechange: move often duplicated (in MSU) define to the udp header.

(svn r8436) -Fix

-Feature: When linking the terraform toolbar to the build toolbars place them side by side instead of on top of each other

(svn r8435) -Regression (r7759?): Readd aircraft.h to the project files which were added in r6644 but miracuously disappeared sometime afterwards

(svn r8434) -Fix (r8430): Missing braces caused compilation failure for some (most?) compilers...

(svn r8431) -Update: WebTranslator2 update to 2007-01-27 19:34:37
catalan - 4 fixed by arnaullv (4)
danish - 4 fixed, 2 changed by MiR (6)
dutch - 4 fixed by habell (4)
french - 4 fixed by glx (4)
german - 4 fixed by Neonox (4)
hungarian - 4 fixed by miham (4)
korean - 4 fixed, 4 changed by Nios (4), leejaeuk5 (4)
lithuanian - 2 changed by Domas (2)
polish - 4 fixed by meush (4)
portuguese - 4 fixed by izhirahider (4)
simplified_chinese - 4 fixed by Fishingsnow (4)
slovenian - 4 fixed, 410 changed by Necrolyte (414)
ukrainian - 34 fixed, 49 changed by mad (79), znikoz (4)

(svn r8430) -Fix

Replace the rather obscure control flow for handling aircraft/ship/train orders by something remotly comprehensible (see r3584)