don't limit server max sides

there are 2 reasons why the maximum side number is limited in some
contexts:
1) The map format can only store 9 starting positions
2) only the first 9 sides have default colors.

However, 'color' and 'starting position' are both sideproperties that
can explicitly given by wml if needed. And the server doesn't use any of
them, so i see no reason why the server should reject those games.
fix mp connect colors

i actualy didnt test whether this casues bugs. But we use color to set
the value of combo_color_ combobox which has only MAX_PLAYER number of
options.
remove outcommented code
Merge pull request #333 from gfgtdf/wesnothd_sides

don't limit server max sides