[Freeciv-Dev] Better handling of attack in client goto

[Gregory Berkolaiko <Gregory.Berkolaiko@xxxxxxxxxxxx>]

The attached patch does a couple things:

1. Allows military ships to plan goto route with shore bombardment.
2. Disallows shore bombardment (including city bombardment) for units with
No_Land_Attack flag.
3. Disallows non-military units from planning a goto route with any sort 
of attack.

What it doesnt do:
A military ship can still plan to bombard an empty enemy city.  I am 
inclined to not fix it, it's too much.

Please test, cirticise.  Will be committed soon.

G.

non_mil_goto.diff
Description: Text document