doc: fix external links with 404 status

Backport-PR-URL: #16275
PR-URL: #15463
Fixes: #15462
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>

doc/api/crypto.md

@@ -2021,7 +2021,7 @@ the `crypto`, `tls`, and `https` modules and are generally specific to OpenSSL.
 [HTML5's `keygen` element]: http://www.w3.org/TR/html5/forms.html#the-keygen-element
 [initialization vector]: https://en.wikipedia.org/wiki/Initialization_vector
 [NIST SP 800-131A]: http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-131Ar1.pdf
-[NIST SP 800-132]: http://csrc.nist.gov/publications/nistpubs/800-132/nist-sp800-132.pdf
+[NIST SP 800-132]: http://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf
 [OpenSSL cipher list format]: https://www.openssl.org/docs/man1.0.2/apps/ciphers.html#CIPHER-LIST-FORMAT
 [OpenSSL's SPKAC implementation]: https://www.openssl.org/docs/man1.0.2/apps/spkac.html
 [publicly trusted list of CAs]: https://mxr.mozilla.org/mozilla/source/security/nss/lib/ckfw/builtins/certdata.txt

doc/api/os.md

@@ -331,7 +331,7 @@ The `os.release()` method returns a string identifying the operating system
 release.
 
 *Note*: On POSIX systems, the operating system release is determined by calling
-uname(3). On Windows, `GetVersionExW()` is used. Please see
+[uname(3)][]. On Windows, `GetVersionExW()` is used. Please see
 https://en.wikipedia.org/wiki/Uname#Examples for more information.
 
 ## os.tmpdir()
@@ -362,11 +362,12 @@ added: v0.3.3
 * Returns: {string}
 
 The `os.type()` method returns a string identifying the operating system name
-as returned by uname(3). For example `'Linux'` on Linux, `'Darwin'` on macOS and
-`'Windows_NT'` on Windows.
+as returned by [uname(3)][]. For example `'Linux'` on Linux, `'Darwin'` on macOS
+and `'Windows_NT'` on Windows.
 
 Please see https://en.wikipedia.org/wiki/Uname#Examples for additional
-information about the output of running uname(3) on various operating systems.
+information about the output of running [uname(3)][] on various operating
+systems.
 
 ## os.uptime()
 <!-- YAML
@@ -1167,3 +1168,4 @@ The following error codes are specific to the Windows operating system:
 [`process.arch`]: process.html#process_process_arch
 [`process.platform`]: process.html#process_process_platform
 [OS Constants]: #os_os_constants
+[uname(3)]: https://linux.die.net/man/3/uname