Fix crash in messages.
Further improvement to transport.
Suppress needless update when natives fortify.
Improve tile cache for old games.
Add missing word
Merge branch 'master' of ssh://git.code.sf.net/p/freecol/git
Defend against comodification.
Clear tile cache for watching players on native settlement removal.
Translation context for some symbols.
Improve goods desynchronization message, it is happening.
Defend against comodification.