Suprisingly some OSes do not have getpass()

        drop a dumb version in lib/getpass.c for missing plaforms.

        * configure.in: Check for getpass ();
        * lib/getpass.c: New file.
        * lib/Makefile.am: Updated.

@@ -7,9 +7,9 @@ INCLUDES = -I${top_srcdir}/include
 libmailutils_a_SOURCES = basename.c daemon.c getopt.c getopt1.c md5.c \
                          mu_dbm.c getline.c xstrdup.c xmalloc.c argcv.c
 
-EXTRA_DIST = alloca.c fnmatch.c setenv.c snprintf.c strchrnul.c strndup.c \
-  strnlen.c strtok_r.c strsignal.c xstrtol.c vasprintf.c malloc.c realloc.c \
-  fgetpwent.c obstack.c
+EXTRA_DIST = alloca.c fnmatch.c fgetpwent.c getpass.c malloc.c obstack.c \
+  realloc.c setenv.c snprintf.c strchrnul.c strndup.c strnlen.c strncasecmp.c \
+  strcasecmp.c strtok_r.c  strsignal.c xstrtol.c  vasprintf.c
 
 noinst_HEADERS = argcv.h error.h fnmatch.h getline.h getopt.h md5.h mu_dbm.h\
  regex.h snprintf.h xalloc.h xstrtol.h obstack.h

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Library Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include  <stdio.h>
+#include  <string.h>
+#include  <stdlib.h>
+#include  <termios.h>
+
+/* Alain: Parts originally from GNU Lib C.  */
+
+static void
+echo_off(int fd, struct termios *stored_settings)
+{
+  struct termios new_settings;
+  tcgetattr (fd, stored_settings);
+  new_settings = *stored_settings;
+  new_settings.c_lflag &= (~ECHO);
+  tcsetattr (fd, TCSANOW, &new_settings);
+}
+
+static void
+echo_on(int fd, struct termios *stored_settings)
+{
+  tcsetattr (fd, TCSANOW, stored_settings);
+}
+
+char *
+getpass (const char * prompt)
+{
+  FILE *in, *out;
+  struct termios stored_settings;
+  static char *buf;
+  static size_t buf_size;
+  char *pbuf;
+
+  /* First pass initialize the buffer.  */
+  if (buf_size == 0)
+    {
+      buf_size = 256;
+      buf = calloc (1, buf_size);
+      if (buf == NULL)
+	return NULL;
+    }
+  else
+    memset (buf, '\0', buf_size);
+
+  /* Turn echoing off if it is on now.  */
+  echo_off (fileno (stdin), &stored_settings);
+
+  /* Write the prompt.  */
+  fputs (prompt, stdout);
+  fflush (stdout);
+
+  /* Read the password.  */
+  pbuf = fgets (buf, buf_size, stdin);
+  if (pbuf)
+    {
+      size_t nread = strlen (pbuf);
+      if (nread && pbuf[nread - 1] == '\n')
+        {
+          /* Remove the newline.  */
+          pbuf[nread - 1] = '\0';
+	  /* Write the newline that was not echoed.  */
+	  putc ('\n', stdout);
+        }
+    }
+
+  /* Restore the original setting.  */
+  echo_on (fileno (stdin), &stored_settings);
+
+  return pbuf;
+}
+
+#ifdef _GETPASS_STANDALONE_TEST
+
+int
+main ()
+{
+  char *p;
+  p = getpass ("my prompt: ");
+  if (p)
+    printf ("Passwd: %s\n", p);
+  return 0;
+}
+#endif