CURLOPT_POSTREDIR.3: update RFC number and section

docs/libcurl/opts/CURLOPT_POSTREDIR.3

@@ -5,7 +5,7 @@
 .\" *                            | (__| |_| |  _ <| |___
 .\" *                             \___|\___/|_| \_\_____|
 .\" *
-.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+.\" * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
 .\" *
 .\" * This software is licensed as described in the file COPYING, which
 .\" * you should have received as part of this distribution. The terms
@@ -32,13 +32,13 @@ CURLcode curl_easy_setopt(CURL *handle, CURLOPT_POSTREDIR,
 .SH DESCRIPTION
 Pass a bitmask to control how libcurl acts on redirects after POSTs that get a
 301, 302 or 303 response back.  A parameter with bit 0 set (value
-\fBCURL_REDIR_POST_301\fP) tells the library to respect RFC2616/10.3.2 and not
-convert POST requests into GET requests when following a 301 redirection.
-Setting bit 1 (value \fBCURL_REDIR_POST_302\fP) makes libcurl maintain the
-request method after a 302 redirect whilst setting bit 2 (value
-\fBCURL_REDIR_POST_303\fP) makes libcurl maintain the request method after a
-303 redirect. The value \fBCURL_REDIR_POST_ALL\fP is a convenience define that
-sets all three bits.
+\fBCURL_REDIR_POST_301\fP) tells the library to respect RFC 7231 (section
+6.4.2 to 6.4.4) and not convert POST requests into GET requests when following
+a 301 redirection.  Setting bit 1 (value \fBCURL_REDIR_POST_302\fP) makes
+libcurl maintain the request method after a 302 redirect whilst setting bit 2
+(value \fBCURL_REDIR_POST_303\fP) makes libcurl maintain the request method
+after a 303 redirect. The value \fBCURL_REDIR_POST_ALL\fP is a convenience
+define that sets all three bits.
 
 The non-RFC behaviour is ubiquitous in web browsers, so the library does the
 conversion by default to maintain consistency. However, a server may require a