doc: make RFC references consistent

Use "RFC 1234" instead of "rfc1234", "RFC1234" or similar variants.

PR-URL: nodejs#26727
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

doc/api/buffer.md

@@ -178,10 +178,10 @@ The character encodings currently supported by Node.js include:
 
 * `'base64'` - Base64 encoding. When creating a `Buffer` from a string,
   this encoding will also correctly accept "URL and Filename Safe Alphabet" as
-  specified in [RFC4648, Section 5].
+  specified in [RFC 4648, Section 5].
 
 * `'latin1'` - A way of encoding the `Buffer` into a one-byte encoded string
-  (as defined by the IANA in [RFC1345],
+  (as defined by the IANA in [RFC 1345],
   page 63, to be the Latin-1 supplement block and C0/C1 control codes).
 
 * `'binary'` - Alias for `'latin1'`.
@@ -2644,8 +2644,8 @@ in UTF-16 code units.
 
 This value may depend on the JS engine that is being used.
 
-[RFC1345]: https://tools.ietf.org/html/rfc1345
-[RFC4648, Section 5]: https://tools.ietf.org/html/rfc4648#section-5
+[RFC 1345]: https://tools.ietf.org/html/rfc1345
+[RFC 4648, Section 5]: https://tools.ietf.org/html/rfc4648#section-5
 [WHATWG Encoding Standard]: https://encoding.spec.whatwg.org/
 [`ArrayBuffer#slice()`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/slice
 [`ArrayBuffer`]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer

doc/api/dns.md

@@ -112,7 +112,7 @@ added: v0.11.3
 
 * Returns: {string[]}
 
-Returns an array of IP address strings, formatted according to [rfc5952][],
+Returns an array of IP address strings, formatted according to [RFC 5952][],
 that are currently configured for DNS resolution. A string will include a port
 section if a custom port is used.
 
@@ -555,10 +555,10 @@ one of the [DNS error codes][].
 <!-- YAML
 added: v0.11.3
 -->
-* `servers` {string[]} array of [rfc5952][] formatted addresses
+* `servers` {string[]} array of [RFC 5952][] formatted addresses
 
 Sets the IP address and port of servers to be used when performing DNS
-resolution. The `servers` argument is an array of [rfc5952][] formatted
+resolution. The `servers` argument is an array of [RFC 5952][] formatted
 addresses. If the port is the IANA default DNS port (53) it can be omitted.
 
 ```js
@@ -647,7 +647,7 @@ added: v10.6.0
 
 * Returns: {string[]}
 
-Returns an array of IP address strings, formatted according to [rfc5952][],
+Returns an array of IP address strings, formatted according to [RFC 5952][],
 that are currently configured for DNS resolution. A string will include a port
 section if a custom port is used.
 
@@ -1008,10 +1008,10 @@ is one of the [DNS error codes](#dns_error_codes).
 <!-- YAML
 added: v10.6.0
 -->
-* `servers` {string[]} array of [rfc5952][] formatted addresses
+* `servers` {string[]} array of [RFC 5952][] formatted addresses
 
 Sets the IP address and port of servers to be used when performing DNS
-resolution. The `servers` argument is an array of [rfc5952][] formatted
+resolution. The `servers` argument is an array of [RFC 5952][] formatted
 addresses. If the port is the IANA default DNS port (53) it can be omitted.
 
 ```js
@@ -1147,5 +1147,5 @@ uses. For instance, _they do not use the configuration from `/etc/hosts`_.
 [DNS error codes]: #dns_error_codes
 [Implementation considerations section]: #dns_implementation_considerations
 [RFC 8482]: https://tools.ietf.org/html/rfc8482
-[rfc5952]: https://tools.ietf.org/html/rfc5952#section-6
+[RFC 5952]: https://tools.ietf.org/html/rfc5952#section-6
 [supported `getaddrinfo` flags]: #dns_supported_getaddrinfo_flags

doc/api/http.md

@@ -2082,7 +2082,7 @@ There are a few special headers that should be noted.
 
 * Sending an 'Expect' header will immediately send the request headers.
   Usually, when sending 'Expect: 100-continue', both a timeout and a listener
-  for the `'continue'` event should be set. See RFC2616 Section 8.2.3 for more
+  for the `'continue'` event should be set. See RFC 2616 Section 8.2.3 for more
   information.
 
 * Sending an Authorization header will override using the `auth` option

doc/api/http2.md

@@ -3223,7 +3223,7 @@ added: v8.4.0
 
 * {string}
 
-Status message is not supported by HTTP/2 (RFC7540 8.1.2.4). It returns
+Status message is not supported by HTTP/2 (RFC 7540 8.1.2.4). It returns
 an empty string.
 
 #### response.stream