Curses: add support for the palette config option

Depends on CHANGE_COLOR compile-time option.

Also allow multiple palette-definitions in the config file.

sys/unix/hints/linux.370

@@ -141,6 +141,7 @@ NHCFLAGS+=-DCOMPRESS=\"/bin/gzip\" -DCOMPRESS_EXTENSION=\".gz\"
 #NHCFLAGS+=-DTTY_SOUND_ESCCODES
 #NHCFLAGS+=-DNO_CHRONICLE
 #NHCFLAGS+=-DLIVELOG
+#NHCFLAGS+=-DCHANGE_COLOR
 NHCFLAGS+=-DSELF_RECOVER
 ifdef WANT_WIN_CURSES
 ifeq "$(HAVE_NCURSESW)" "1"