More cleanup. Added license blurb to top of all source files.

Remove all old $Id:$ and similar constructs, they don't provide any
additional benefit anymore.

Add configure options for toggling terminal bell and  toying with
SIGSTOP using Ctrl-Z.  Rename config option for ANSI keys to get
a consistent namespace.

Also did some work on ANSI-fication of function definitions, lot's
of that was still lingering around.

configure.ac

@@ -55,7 +55,7 @@ AC_ARG_ENABLE([default-complete],
         AC_MSG_ERROR([bad value ${enableval} for --enable-default-complete])
         ;;
    esac],[complete=false])
-AM_CONDITIONAL([COMPLETE], [test x$complete = xtrue])
+AM_CONDITIONAL([CONFIG_DEFAULT_COMPLETE], [test x$complete = xtrue])
 
 ac_enable_arrow_keys=no
 AC_ARG_ENABLE(arrow-keys,
@@ -63,8 +63,28 @@ AC_ARG_ENABLE(arrow-keys,
    [ ac_enable_arrow_keys=$enableval ], [ ac_enable_arrow_keys=no])
 
 if test "x${ac_enable_arrow_keys}" = xyes ; then
-    AC_DEFINE([ANSI_ARROWS], [],
-  [Define to include ANSI arrow keys support in minix-editline])
+    AC_DEFINE([CONFIG_ANSI_ARROWS], [],
+  [Define to include ANSI arrow keys support.])
+fi
+
+ac_enable_sigstop=no
+AC_ARG_ENABLE(sigstop,
+   [  --enable-sigstop               Enable SIGSTOP key.],
+   [ ac_enable_sigstop=$enableval ], [ ac_enable_sigstop=no])
+
+if test "x${ac_enable_sigstop}" = xyes ; then
+    AC_DEFINE([CONFIG_SIGSTOP], [],
+  [Define to enable SIGSTOP (Ctrl-Z) key.])
+fi
+
+ac_enable_terminal_bell=no
+AC_ARG_ENABLE(terminal-bell,
+   [  --enable-terminal-bell         Enable terminal bell on completion.],
+   [ ac_enable_terminal_bell=$enableval ], [ ac_enable_terminal_bell=no])
+
+if test "x${ac_enable_terminal_bell}" = xyes ; then
+    AC_DEFINE([CONFIG_ANNOYING_NOISE], [],
+  [Define to enable terminal bell on completion.])
 fi
 
 AC_OUTPUT(Makefile src/Makefile include/Makefile man/Makefile examples/Makefile)