[Freeciv-Dev] Patch: Requirement generalization for units

[Marko Lindqvist <caz@xxxxxxxxxxxxxxxx>]

 This is first part of requirement ganeralization code. It allows setting
several tech requirements for units.

 - Patched units.ruleset included, civ1 and civ2 rulesets not.
 - When only one tech requirement set, everything should work exactly like
   before.
 - Helpbrowsers and rulesout command need fixing if units use more than
   one tech requirement
    - Rulesout lists units allowed by their first (order in ruleset)
      required tech. Units are listed obsoleted with first tech required
      for unit that really obsoletes them.
    - Helpbrowser tech section works lists allowed units as rulesout does.
    - Helpbrowser unit section shows first not yet discovered (by this
      player) required tech as only requirement. If all required techs are
      already discodered, it shows first required tech.
 - Only GTK client is changed, other clients won't even compile.


 btw. Is there interest for putting req_gen into CVS? Should I send it as
small patches to mailing list (it's better to put into CVS in small parts)
or should I just send one big patch to ftp.freeciv.org for those 
interested when I have finished it?


 Caz

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