* Add con_log.c to log all console output

* Add con_passive.c to cut down on #ifdef DEDICATED in sys_main.c
* Add Sys_ErrorDialog to report ERR_FATALs to the user
  + On Windows use a MessageBox and offer to copy the console log to the
    clipboard
  + On everything else print to the terminal and save the console log as
    crashlog.txt

Makefile

@@ -1221,6 +1221,8 @@ Q3OBJ = \
   $(B)/client/sdl_input.o \
   $(B)/client/sdl_snd.o \
   \
+  $(B)/client/con_passive.o \
+  $(B)/client/con_log.o \
   $(B)/client/sys_main.o
 
 ifeq ($(ARCH),i386)
@@ -1358,6 +1360,7 @@ Q3DOBJ = \
   $(B)/ded/null_input.o \
   $(B)/ded/null_snddma.o \
   \
+  $(B)/ded/con_log.o \
   $(B)/ded/sys_main.o
 
 ifeq ($(ARCH),i386)