Fixed syntax error in configure when SDL_gfx is missing.

See bug #21533


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24252 a0f10bec-cc02-0410-94fc-a9cfff90b4cd
Do not announce client started games in LAN.

Reported by David Lowe

See patch #4438


git-svn-id: svn://svn.gna.org/svn/freeciv/trunk@24254 a0f10bec-cc02-0410-94fc-a9cfff90b4cd