[Freeciv-Dev] Diplomatic states patch

[Falk Hueffner <falk.hueffner@xxxxxxxxxxxxxxxxxxxxxxxx>]

Hi,

here's a patch with some changes for the diplomatic states ("pacts").

* Can't attack in Neutral state (or it wouldn't be different from war
  at all). Declaring war from Neutral state doesn't harm reputation.
  The "cancel treaty" button disabeledness needs to be adapted for
  other clients than gtk, too. This probably breaks save games where
  the AI is Neutral.

* Introduce new diplomatic state "No contact". Players get notified on
  first contact. AI is set to War instead of Neutral on first contact. 

        Falk

pacts.patch
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