Some fixes to all USE_SYSTEM_CURSES to force the vendors curses implementation

even if the build system would like to use ncurses (ie: NetBSD)

src/conio/Common.gmake

@@ -3,7 +3,11 @@
 #else
 # CIOLIB-MT_LIBS		+=	$(UL_PRE)ncurses$(UL_SUF)
 #endif
-CIOLIB-MT_LIBS		+=	$(UL_PRE)ncurses$(UL_SUF)
+ifdef USE_SYSTEM_CURSES
+ CIOLIB-MT_LIBS		+=	$(UL_PRE)curses$(UL_SUF)
+else
+ CIOLIB-MT_LIBS		+=	$(UL_PRE)ncurses$(UL_SUF)
+endif
 ifndef NO_X
  ifdef STATIC
   CIOLIB-MT_LIBS		+=	-L$(X_PATH)$(DIRSEP)lib -lX11

src/conio/GNUmakefile

@@ -26,7 +26,9 @@ else
 endif
 
 ifeq ($(os),netbsd)
- CFLAGS	+=	-DN_CURSES_LIB
+ ifndef USE_SYSTEM_CURSES
+  CFLAGS	+=	-DN_CURSES_LIB
+ endif
 endif
 
 $(MTOBJODIR)$(DIRSEP)console$(OFILE).static:

src/conio/ciolib.c

@@ -207,7 +207,7 @@ int try_curses_init(int mode)
 		cio_api.hidemouse=curs_hidemouse;
 		cio_api.suspend=curs_suspend;
 		cio_api.resume=curs_resume;
-#ifdef NCURSES_VERSION_MAJOR
+#if defined(NCURSES_VERSION_MAJOR) || defined (__NetBSD__)
 		cio_api.ESCDELAY=&ESCDELAY;
 #endif
 		return(1);