Delete bundled copy of NSS and replace with README.

nspr/lib/libc/src/strdup.c

-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "plstr.h"
-#include "prmem.h"
-#include <string.h>
-
-PR_IMPLEMENT(char *)
-PL_strdup(const char *s)
-{
-    char *rv;
-    size_t n;
-
-    if( (const char *)0 == s )
-        s = "";
-
-    n = strlen(s) + 1;
-
-    rv = (char *)malloc(n);
-    if( (char *)0 == rv ) return rv;
-
-    (void)memcpy(rv, s, n);
-
-    return rv;
-}
-
-PR_IMPLEMENT(void)
-PL_strfree(char *s)
-{
-    free(s);
-}
-
-PR_IMPLEMENT(char *)
-PL_strndup(const char *s, PRUint32 max)
-{
-    char *rv;
-    size_t l;
-
-    if( (const char *)0 == s )
-        s = "";
-
-    l = PL_strnlen(s, max);
-
-    rv = (char *)malloc(l+1);
-    if( (char *)0 == rv ) return rv;
-
-    (void)memcpy(rv, s, l);
-    rv[l] = '\0';
-
-    return rv;
-}