Move Amiga port files from outdated/ to sys/amiga/

Move the active Amiga source files back into their proper locations.
Legacy native build files (Makefile.ami, Build.ami, etc.) remain
in outdated/ as they are not used by the cross-compilation build.

sys/amiga/amitty.c

@@ -0,0 +1,84 @@
+/* NetHack 3.6	amitty.c	$NHDT-Date: 1432512795 2015/05/25 00:13:15 $  $NHDT-Branch: master $:$NHDT-Revision: 1.7 $ */
+/*    Copyright (c) Kenneth Lorber, Bethesda, Maryland 1993,1996  */
+/* NetHack may be freely redistributed.  See license for details. */
+
+/* TTY-specific code for the Amiga
+ * This is still experimental.
+ * Still to do:
+ * add real termcap handling - currently requires ANSI_DEFAULT
+ */
+
+#include "hack.h"
+#include "tcap.h"
+#include <stdio.h>
+#include <proto/dos.h>
+
+#ifdef _DCC
+#define getch() getchar()
+#endif
+#ifdef __SASC_60
+#include <clib/dos_protos.h>
+#endif
+
+void tty_change_color(void);
+char *tty_get_color_string(void);
+
+#ifdef TTY_GRAPHICS
+
+int amibbs = 0;       /* BBS mode */
+char bbs_id[80] = ""; /* BBS uid equivalent */
+long afh_in, afh_out; /* BBS mode Amiga filehandles */
+
+void
+settty(const char *s)
+{
+    end_screen();
+    if (s)
+        raw_print(s);
+    iflags.cbreak = ON; /* this is too easy: probably wrong */
+#if 1                   /* should be version>=36 */
+                        /*	if(IsInteractive(afh_in)){ */
+    SetMode(afh_in, 0); /* con mode */
+/*	} */
+#endif
+}
+void
+gettty()
+{
+#if 1                   /* should be VERSION >=36 */
+                        /*	if(IsInteractive(afh_in)){ */
+    SetMode(afh_in, 1); /* raw mode */
+/*	} */
+#endif
+}
+void
+setftty()
+{
+    iflags.cbreak = ON; /* ditto */
+}
+char kill_char = 'X' - '@';
+char erase_char = '\b';
+tgetch()
+{
+    char x;
+    Read(afh_in, &x, 1);
+    return (x == '\r') ? '\n' : x;
+}
+void
+get_scr_size()
+{
+    CO = 80;
+    LI = 24;
+}
+
+#endif
+
+void
+tty_change_color()
+{
+}
+char *
+tty_get_color_string()
+{
+    return ("");
+}