CMake: Give the server target a permanent name independent of exec name

The name used to be the same as the server executable name
but such approach leads to massive rebuild on the exec name changed.

(A use-case: production and testing builds with different executables)

CMakeLists.txt

@@ -724,15 +724,18 @@ set(LIBS_SERVER
 )
 
 # Target
-set(TARGET_SERVER ${SERVER_EXECUTABLE})
-add_executable(${TARGET_SERVER}
+add_executable(Server
   ${DEPS}
   ${SERVER_SRC}
   ${SERVER_ICON}
   $<TARGET_OBJECTS:engine-shared>
   $<TARGET_OBJECTS:game-shared>
 )
 
+set_property(TARGET Server
+    PROPERTY OUTPUT_NAME ${SERVER_EXECUTABLE}
+)
+
 if(GEOLOCATION)
   add_library(GeoLite2PP STATIC
     ${CMAKE_CURRENT_SOURCE_DIR}/src/infclassr/GeoLite2PP/GeoLite2PP.cpp
@@ -746,31 +749,31 @@ if(GEOLOCATION)
   )
   add_library(GeoLite2PP::GeoLite2PP ALIAS GeoLite2PP)
 
-  target_sources(${TARGET_SERVER} PRIVATE
+  target_sources(Server PRIVATE
     "src/infclassr/geolocation.cpp"
     "src/infclassr/geolocation.h"
   )
 
-  target_compile_definitions(${TARGET_SERVER} PRIVATE CONF_GEOLOCATION)
-  target_link_libraries(${TARGET_SERVER}
+  target_compile_definitions(Server PRIVATE CONF_GEOLOCATION)
+  target_link_libraries(Server
     GeoLite2PP::GeoLite2PP
     MaxMindDB::MaxMindDB
   )
 endif()
 
-target_link_libraries(${TARGET_SERVER} ${LIBS_SERVER})
-list(APPEND TARGETS_OWN ${TARGET_SERVER})
-list(APPEND TARGETS_LINK ${TARGET_SERVER})
+target_link_libraries(Server ${LIBS_SERVER})
+list(APPEND TARGETS_OWN Server)
+list(APPEND TARGETS_LINK Server)
 
-target_link_libraries(${TARGET_SERVER} md5)
-target_link_libraries(${TARGET_SERVER} engine-shared)
-target_link_libraries(${TARGET_SERVER} game-shared)
-target_link_libraries(${TARGET_SERVER} ICU::i18n)
-target_link_libraries(${TARGET_SERVER} ICU::uc)
+target_link_libraries(Server md5)
+target_link_libraries(Server engine-shared)
+target_link_libraries(Server game-shared)
+target_link_libraries(Server ICU::i18n)
+target_link_libraries(Server ICU::uc)
 
 if(TARGET_OS AND TARGET_OS STREQUAL "mac")
   set(SERVER_LAUNCHER_SRC src/osxlaunch/server.mm)
-  set(TARGET_SERVER_LAUNCHER ${TARGET_SERVER}-Launcher)
+  set(TARGET_SERVER_LAUNCHER Server-Launcher)
   add_executable(${TARGET_SERVER_LAUNCHER} ${SERVER_LAUNCHER_SRC})
   target_link_libraries(${TARGET_SERVER_LAUNCHER} ${COCOA})
   list(APPEND TARGETS_OWN ${TARGET_SERVER_LAUNCHER})