Give an error if some tool executable is given unknown commandline option.

See bug #21538


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24286 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Document the need to give --enable-debug configure option in order to be able
to run dynamic AI modules from build dir.

Requested by Anonymous

See bug #17558


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24290 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Added mpcli.c to POTFILES


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24294 a0f10bec-cc02-0410-94fc-a9cfff90b4cd