Fixed build with --disable-nls

See bug #21980


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24836 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Removed unused progtest.m4

See patch #4673


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24837 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Fixes to civ2civ3 ruleset base definitions
- Effects related to Bases were using the range "Tile". Replaced by "Local". 
- Added regen HP effect for Airbases, else Helicopters can not "refuel" there.
- Fortresses and Airbases conflict with each other

Patch by David Fernandez <bardo>

See patch #4636


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24838 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Implemented extra_index() as an macro to avoid function call overhead.

See patch #4670


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24840 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Added requirement type "MinCulture"

See patch #4668


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24841 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Added freeciv domain source file actions.c to POTFILES.skip of other
domains.


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24842 a0f10bec-cc02-0410-94fc-a9cfff90b4cd